#include <stdio.h>
#include <string.h>
int main() {
    
    char num1[10], num2[10];
    int i, j, count;
    scanf(" %s", &num1);
    scanf(" %s", &num2);
    for (i = 0; i <= sizeof(num1); i++) {
        for (j = 0; j <= sizeof(num2); j++) {
            if (num1[i] == num2[j]) {
                printf(" %s", num1[i]);
                count += 1;
            }
        }
    } if (count <=0) {
        printf("No common elements");
        return 0;
    }
    return 0;
    
}