import bisect
import copy
import decimal
import fractions
import heapq
import itertools
import math
import random
import sys
import time
from collections import Counter,deque,defaultdict
from functools import lru_cache,reduce
from heapq import heappush,heappop,heapify,heappushpop,_heappop_max,_heapify_max
def _heappush_max(heap,item):
    heap.append(item)
    heapq._siftdown_max(heap, 0, len(heap)-1)
def _heappushpop_max(heap, item):
    if heap and item < heap[0]:
        item, heap[0] = heap[0], item
        heapq._siftup_max(heap, 0)
    return item
from math import gcd as GCD
read=sys.stdin.read
readline=sys.stdin.readline
readlines=sys.stdin.readlines
write=sys.stdout.write

def SA_IS(lst,compressed=False):
    N=len(lst)
    if not compressed:
        decomp=sorted(list(set(lst)))
        comp={x:i for i,x in enumerate(decomp)}
        lst=[comp[s]+1 for s in lst]+[0]
    else:
        lst=[s+1 for s in lst]+[0]

    def induced_sort(N,lst,type,LMS,bucket_count,sorted_LMS_index=None):
        buckets_left=[[] for b in range(bucket_count)]
        buckets_right=[[] for b in range(bucket_count)]
        if sorted_LMS_index==None:
            for i in LMS:
                buckets_right[lst[i]].append(i)
        else:
            for i in sorted_LMS_index[::-1]:
                buckets_right[lst[LMS[i]]].append(LMS[i])
        for b in range(bucket_count):
            for i in buckets_left[b]:
                if i and type[i-1]=="L":
                    buckets_left[lst[i-1]].append(i-1)
            for i in buckets_right[b][::-1]:
                if i and type[i-1]=="L":
                    buckets_left[lst[i-1]].append(i-1)
            buckets_right[b]=[]
        for b in range(bucket_count-1,-1,-1):
            for i in buckets_right[b]:
                if i and type[i-1]=="S":
                    buckets_right[lst[i-1]].append(i-1)
            for i in buckets_left[b][::-1]:
                if i and type[i-1]=="S":
                    buckets_right[lst[i-1]].append(i-1)
        suffix_array=[N]
        for b in range(1,bucket_count):
            suffix_array+=buckets_left[b]+buckets_right[b][::-1]
        return suffix_array
    
    stack=[]
    while N>=1:
        type=[None]*(N+1)
        type[N]="S"
        for i in range(N-1,-1,-1):
            if lst[i]<lst[i+1]:
                type[i]="S"
            elif lst[i]>lst[i+1]:
                type[i]="L"
            else:
                type[i]=type[i+1]
        LMS=[i for i in range(1,N) if type[i-1]=="L" and type[i]=="S"]+[N]
        bucket_count=max(lst)+1
        stack.append((N,lst,type,LMS,bucket_count))
        suffix_array=induced_sort(N,lst,type,LMS,bucket_count)
        LMS_substring=[None]*(N+1)
        for i in range(len(LMS)-1):
            LMS_substring[LMS[i]]=lst[LMS[i]:LMS[i+1]]
        LMS_substring[N]=lst[N:N+1]
        num=0
        prev=[0]
        for i in suffix_array:
            if LMS_substring[i]!=None:
                if prev!=LMS_substring[i]:
                    prev=LMS_substring[i]
                    num+=1
                LMS_substring[i]=num
        lst=[LMS_substring[i] for i in LMS]
        N=len(lst)-1
    sorted_LMS_index=[0]
    for N,lst,type,LMS,bucket_count in stack[::-1]:
        suffix_array=induced_sort(N,lst,type,LMS,bucket_count,sorted_LMS_index)
        sorted_LMS_index=suffix_array
    suffix_array=suffix_array[1:]
    return suffix_array

class Rolling_Hash:
    def __init__(self,lst,base,mod):
        assert math.gcd(base,mod)==1
        self.len=len(lst)
        self.base=base
        self.mod=mod
        self.rolling_hash=[None]*(self.len+1)
        self.rolling_hash[0]=0
        x=1
        for i in range(1,self.len+1):
            self.rolling_hash[i]=self.rolling_hash[i-1]+x*lst[i-1]
            self.rolling_hash[i]%=self.mod
            x*=self.base
            x%=self.mod
        x=MOD(self.mod).Pow(x,-1)
        self.base_reverse=[None]*(self.len+1)
        self.base_reverse[self.len]=x
        for i in range(self.len-1,-1,-1):
            self.base_reverse[i]=self.base_reverse[i+1]*self.base%self.mod

    def __getitem__(self,i):
        if type(i)==int:
            a,b=i,i+1
        else:
            a,b=i.start,i.stop
            if a==None or a<-self.len:
                a=0
            elif self.len<=a:
                a=self.len
            elif a<0:
                a+=self.len
            if b==None or self.len<=b:
                b=self.len
            elif b<-self.len:
                b=0
            elif b<0:
                b+=self.len
        return (self.rolling_hash[b]-self.rolling_hash[a])*self.base_reverse[a]%self.mod

    def __len__(self):
        return self.len

def Extended_Euclid(n,m):
    stack=[]
    while m:
        stack.append((n,m))
        n,m=m,n%m
    if n>=0:
        x,y=1,0
    else:
        x,y=-1,0
    for i in range(len(stack)-1,-1,-1):
        n,m=stack[i]
        x,y=y,x-(n//m)*y
    return x,y

class MOD:
    def __init__(self,p,e=None):
        self.p=p
        self.e=e
        if self.e==None:
            self.mod=self.p
        else:
            self.mod=self.p**self.e

    def Pow(self,a,n):
        a%=self.mod
        if n>=0:
            return pow(a,n,self.mod)
        else:
            assert math.gcd(a,self.mod)==1
            x=Extended_Euclid(a,self.mod)[0]
            return pow(x,-n,self.mod)

    def Build_Fact(self,N):
        assert N>=0
        self.factorial=[1]
        if self.e==None:
            for i in range(1,N+1):
                self.factorial.append(self.factorial[-1]*i%self.mod)
        else:
            self.cnt=[0]*(N+1)
            for i in range(1,N+1):
                self.cnt[i]=self.cnt[i-1]
                ii=i
                while ii%self.p==0:
                    ii//=self.p
                    self.cnt[i]+=1
                self.factorial.append(self.factorial[-1]*ii%self.mod)
        self.factorial_inve=[None]*(N+1)
        self.factorial_inve[-1]=self.Pow(self.factorial[-1],-1)
        for i in range(N-1,-1,-1):
            ii=i+1
            while ii%self.p==0:
                ii//=self.p
            self.factorial_inve[i]=(self.factorial_inve[i+1]*ii)%self.mod

    def Fact(self,N):
        if N<0:
            return 0
        retu=self.factorial[N]
        if self.e!=None and self.cnt[N]:
            retu*=pow(self.p,self.cnt[N],self.mod)%self.mod
            retu%=self.mod
        return retu

    def Fact_Inve(self,N):
        if self.e!=None and self.cnt[N]:
            return None
        return self.factorial_inve[N]

    def Comb(self,N,K,divisible_count=False):
        if K<0 or K>N:
            return 0
        retu=self.factorial[N]*self.factorial_inve[K]%self.mod*self.factorial_inve[N-K]%self.mod
        if self.e!=None:
            cnt=self.cnt[N]-self.cnt[N-K]-self.cnt[K]
            if divisible_count:
                return retu,cnt
            else:
                retu*=pow(self.p,cnt,self.mod)
                retu%=self.mod
        return retu

def Bisect_Int(ok,ng,is_ok):
    while abs(ok-ng)>1:
        mid=(ok+ng)//2
        if is_ok(mid):
            ok=mid
        else:
            ng=mid
    return ok

class Segment_Tree:
    def __init__(self,N,f,e,lst=None,dynamic=False):
        self.f=f
        self.e=e
        self.N=N
        if dynamic:
            self.segment_tree=defaultdict(lambda:self.e)
        else:
            if lst==None:
                self.segment_tree=[self.e]*2*self.N
            else:
                assert len(lst)<=self.N
                self.segment_tree=[self.e]*self.N+[x for x in lst]+[self.e]*(N-len(lst))
                for i in range(self.N-1,0,-1):
                    self.segment_tree[i]=self.f(self.segment_tree[i<<1],self.segment_tree[i<<1|1])

    def __getitem__(self,i):
        if type(i)==int:
            if -self.N<=i<0:
                return self.segment_tree[i+self.N*2]
            elif 0<=i<self.N:
                return self.segment_tree[i+self.N]
            else:
                raise IndexError("list index out of range")
        else:
            a,b,c=i.start,i.stop,i.step
            if a==None:
                a=self.N
            else:
                a+=self.N
            if b==None:
                b=self.N*2
            else:
                b+=self.N
            return self.segment_tree[slice(a,b,c)]

    def __setitem__(self,i,x):
        if -self.N<=i<0:
            i+=self.N*2
        elif 0<=i<self.N:
            i+=self.N
        else:
            raise IndexError("list index out of range")
        self.segment_tree[i]=x
        while i>1:
            i>>= 1
            self.segment_tree[i]=self.f(self.segment_tree[i<<1],self.segment_tree[i<<1|1])

    def Build(self,lst):
        for i,x in enumerate(lst,self.N):
            self.segment_tree[i]=x
        for i in range(self.N-1,0,-1):
            self.segment_tree[i]=self.f(self.segment_tree[i<<1],self.segment_tree[i<<1|1])

    def Fold(self,L=None,R=None):
        if L==None:
            L=self.N
        else:
            L+=self.N
        if R==None:
            R=self.N*2
        else:
            R+=self.N
        vL=self.e
        vR=self.e
        while L<R:
            if L&1:
                vL=self.f(vL,self.segment_tree[L])
                L+=1
            if R&1:
                R-=1
                vR=self.f(self.segment_tree[R],vR)
            L>>=1
            R>>=1
        return self.f(vL,vR)

    def Fold_Index(self,L=None,R=None):
        if L==None:
            L=self.N
        else:
            L+=self.N
        if R==None:
            R=self.N*2
        else:
            R+=self.N
        if L==R:
            return None
        x=self.Fold(L-self.N,R-self.N)
        while L<R:
            if L&1:
                if self.segment_tree[L]==x:
                    i=L
                    break
                L+=1
            if R&1:
                R-=1
                if self.segment_tree[R]==x:
                    i=R
                    break
            L>>=1
            R>>=1
        while i<self.N:
            if self.segment_tree[i]==self.segment_tree[i<<1]:
                i<<=1
            else:
                i<<=1
                i|=1
        i-=self.N
        return i

    def Bisect_Right(self,L=None,f=None):
        if L==self.N:
            return self.N
        if L==None:
            L=0
        L+=self.N
        vl=self.e
        vr=self.e
        l,r=L,self.N*2
        while l<r:
            if l&1:
                vl=self.f(vl,self.segment_tree[l])
                l+=1
            if r&1:
                r-=1
                vr=self.f(self.segment_tree[r],vr)
            l>>=1
            r>>=1
        if f(self.f(vl,vr)):
            return self.N
        v=self.e
        while True:
            while L%2==0:
                L>>=1
            vv=self.f(v,self.segment_tree[L])
            if f(vv):
                v=vv
                L+=1
            else:
                while L<self.N:
                    L<<=1
                    vv=self.f(v,self.segment_tree[L])
                    if f(vv):
                        v=vv
                        L+=1
                return L-self.N

    def Bisect_Left(self,R=None,f=None):
        if R==0:
            return 0
        if R==None:
            R=self.N
        R+=self.N
        vl=self.e
        vr=self.e
        l,r=self.N,R
        while l<r:
            if l&1:
                vl=self.f(vl,self.segment_tree[l])
                l+=1
            if r&1:
                r-=1
                vr=self.f(self.segment_tree[r],vr)
            l>>=1
            r>>=1
        if f(self.f(vl,vr)):
            return 0
        v=self.e
        while True:
            R-=1
            while R>1 and R%2:
                R>>=1
            vv=self.f(self.segment_tree[R],v)
            if f(vv):
                v=vv
            else:
                while R<self.N:
                    R=2*R+1
                    vv=self.f(self.segment_tree[R],v)
                    if f(vv):
                        v=vv
                        R-=1
                return R+1-self.N

    def __str__(self):
        return "["+", ".join(map(str,self.segment_tree[self.N:]))+"]"

class Path_Doubling:
    def __init__(self,N,permutation,lst=None,f=None,e=None):
        self.N=N
        self.permutation=permutation
        self.lst=lst
        self.f=f
        self.e=e

    def Build_Next(self,K=None):
        if K==None:
            K=self.N
        self.k=K.bit_length()
        self.permutation_doubling=[[self.permutation[n]] for n in range(self.N)]
        if self.lst!=None:
            self.doubling=[[self.lst[n]] for n in range(self.N)]
        for i in range(1,self.k):
            for n in range(self.N):
                self.permutation_doubling[n].append(self.permutation_doubling[self.permutation_doubling[n][i-1]][i-1])
                if self.f!=None:
                    self.doubling[n].append(self.f(self.doubling[n][i-1],self.doubling[self.permutation_doubling[n][i-1]][i-1]))

    def Permutation_Doubling(self,N,K):
        if K<0:
            return N
        for i in range(self.k):
            if K>>i&1:
                N=self.permutation_doubling[N][i]
        return N

    def Doubling(self,N,K):
        if K<0:
            return self.e
        retu=self.e
        for i in range(self.k):
            if K>>i&1:
                retu=self.f(retu,self.doubling[N][i])
                N=self.permutation_doubling[N][i]
        return retu

class Sparse_Table:
    def __init__(self,N,f,e,lst):
        self.N=N
        self.f=f
        self.e=e
        self.n=N.bit_length()
        self.dp=[[None]*(self.N-(1<<n)+1) for n in range(self.n)]
        if self.n:
            for i in range(self.N):
                self.dp[0][i]=lst[i]
            for n in range(1,self.n):
                for i in range(self.N-(1<<n)+1):
                    self.dp[n][i]=self.f(self.dp[n-1][i],self.dp[n-1][i+(1<<n-1)])

    def Fold(self,L,R):
        if L==R:
            return self.e
        n=(R-L).bit_length()-1
        return self.f(self.dp[n][L],self.dp[n][R-(1<<n)])

from operator import itemgetter
N=int(readline())
S=[readline().rstrip() for n in range(N)]
S=sorted(list(enumerate(S)),key=itemgetter(1))
idx=[None]*N
for i in range(N):
    idx[S[i][0]]=i
    S[i]=S[i][1]
base=random.randint(1<<50,1<<51)
mod=(1<<61)-1
LCP=[0]*(N-1)
for i in range(N-1):
    for a,b in zip(S[i],S[i+1]):
        if a==b:
            LCP[i]+=1
        else:
            break
ans=0
inf=1<<30
LCP=Sparse_Table(N-1,min,inf,LCP)
M,x,d=map(int,readline().split())
for k in range(1,M+1):
    i,j=(x//(N-1)),(x%(N-1))
    if i>j:
        i,j=j,i
    else:
        j+=1
    x=(x+d)%(N*(N-1))
    i,j=idx[i],idx[j]
    if i>j:
        i,j=j,i
    ans+=LCP.Fold(i,j)
print(ans)