#include <iostream>
#include <string.h>
using namespace std;
int main (void) {
int num;
int index = 0;
char word[100] = {0, };
int count = 0;
scanf("%d", &num);
for (int i = 0; i < num; ++i) {
//printf("i[%d], num[%d]\n", i, num);
bool number[26] = {0, };
bool sequence = false;
scanf("%s", word);
for(int j = 0; word[j] != '\0'; ++j) {
index = word[j] - 97;
//printf("index : %d\n", index);
if(number[index] == true) {
if (j > 0 && word[j] == word[j-1])
sequence = true;
else
sequence = false;
} else {
number[index] = true;
sequence = true;
}
}
if(sequence == true){
//printf("%s\n", word);
count++;
}
}
printf("%d", count);
return 0;
}
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