from sys import stdin

N = int(stdin.readline())

a,b,c = map(int,input().split())

OS = list(stdin.readline()[:-1].split())
S = [len(OS[i]) for i in range(N)]

for i in range(N-1):
    S[i+1] += S[i]

s = set(S)
s.add(0)
ans = 0
for i in S:
    if (i-c in s) and (i-c-b in s) and (i-c-b-a in s):
        ans += 1

print(ans)