import sys
input = sys.stdin.readline

R,C,T=map(int,input().split())
x,y=map(int,input().split())
z0,w0=map(int,input().split())

def prod(A,B,k,l,m):# A:k*l,B:l*m
    C=[[0 for i in range(m)] for j in range(k)]

    for i in range(k):
        for j in range(m):
            ANS=0
            for pl in range(l):
                ANS=(ANS+A[i][pl]*B[pl][j])

            C[i][j]=ANS

    return C

def plus(A,B,k,l):# a,B:k*l
    C=[[0 for i in range(l)] for j in range(k)]

    for i in range(k):
        for j in range(l):
            C[i][j]=(A[i][j]+B[i][j])

    return C

B=[input().strip() for i in range(R)]

A=[[0]*(R*C) for i in range(R*C)]

for i in range(R):
    for j in range(C):
        fr=C*i+j
        if B[i][j]==".":
            pos=0

            for z,w in [(i+1,j),(i-1,j),(i,j+1),(i,j-1)]:
                if 0<=z<R and 0<=w<C:
                    if B[z][w]==".":
                        pos+=1

            if pos>0:
                for z,w in [(i+1,j),(i-1,j),(i,j+1),(i,j-1)]:
                    if 0<=z<R and 0<=w<C:
                        if B[z][w]==".":
                            to=z*C+w

                            A[fr][to]=1/pos
            else:
                A[i*C+j][i*C+j]=1

POWA=[A]
            


for i in range(31):
    POWA.append(prod(POWA[-1],POWA[-1],R*C,R*C,R*C)) # ベキを求めて

n=T
X=[0]*(R*C)
X[x*C+y]=1
X=[X]

while n:
    X=prod(X,POWA[n.bit_length()-1],1,R*C,R*C) # n乗の場合
    n-=1<<(n.bit_length()-1)

print(X[0][z0*C+w0])