#include <stdio.h>
#include <string.h>
 
 
int main(){
    int c = 0;
    scanf("%d", &c);
 
    int count = 0;
 
    for(int i = 0; i < c; i++){
        char s[100005] = {NULL};
        scanf("%s", &s);
 
        int len = strlen(s);
 
        if(len % 2 == 1) break; // 단어의 길이가 홀수라면 애초에 '좋은 단어'가 아니다(예제 2 참조)
        else {
            printf("%d", len);
        }
    }
}

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MwpBQUEKQUEKQUI=

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