#include <stdio.h>
#include <string.h>
#include <stdlib.h>
char arr[1000007], imsi[1000007];
int brr[1000007], crr[30] = {2,2,2,3,3,3,4,4,4,5,5,5,6,6,6,7,7,7,7,8,8,8,9,9,9,9};
int main () {
int t, len, ans = 0, k;
scanf("%d",&t);
for (int i = 0; i < t; i++) {
scanf(" %s",arr);
len = strlen(arr);
for (int j = 0; j < len; j++) {
imsi[j] = crr[arr[j] - 97] + 48;
}
brr[i] = atoi(imsi);
for (int j = 0; j < len; j++) imsi[j] = 0;
}
scanf("%d",&k);
for (int i = 0; i < t; i++) {
if (brr[i] == k) ans++;
}
printf("%d",ans);
return 0;
}