n=int(input())
S = [input().split() for i in range(n)] 
cnt=0

for i in range(n):
    a=0
    b=0
    c=0
    d=0
    for j in range(4):
        if(S[i][j]=="akai"):
            a=1
        if(S[i][j]=="marui"):
            b=1
        if(S[i][j]=="okii"):
            c=1
        if(S[i][j]=="umai"):
            d=1
    if a and b and c and d:
        cnt+=1

print(cnt)