#include <stdio.h>
#include <string.h>

int main() {
    char a[100][1000];
    int max = 0, min = 999, i = 0;
    while (gets(a[i])) { // 注意 while 处理多个 case
        // 64 位输出请用 printf("%lld") to
        if (min >= strlen(a[i])) {
            min = strlen(a[i]);
        }
        if (max <= strlen(a[i])) {
            max = strlen(a[i]);
        }
        i++;
        //printf("%s\n", a[i-1]);
    }
    //printf("%d_%d\n",max,min);
    int m;
    for (m = 0; m < i; m++) {
        if (strlen(a[m]) == min) {
            printf("%s\n", a[m]);
        }
        
    }
    for (m = 0; m < i; m++) {
        
        if (strlen(a[m]) == max) {
            printf("%s\n", a[m]);
        }
    }
    return 0;
}