n=int(input())
s=input().strip('\n')
m=int(input())
ss=[""]*m
ans=0
for i in range(m):
    ss[i]=input().strip('\n')
for i in range(len(s)):
    for j in range(i,len(s)):
        if s[i:j+1] in ss:
            ans+=1
print(ans)