View Code of Problem 22

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

int main(void)
{
    char s1[1001],s2[1001];
    while(gets(s1) && gets(s2))
    {

        int i,j,arr2[27] = {0},arr1[27] = {0},len1 = strlen(s1),len2 = strlen(s2);
        for(i = 0;i < len1;i++)
        {
                arr1[s1[i] - 'a' + 0]++;
        }
        for(j = 0;j < len2;j++)
        {

                arr2[s2[j] -'a' + 0]++;
        }

        for(i = 0;i < 27;i++)
        {
            if(arr2[i] && arr1[i])
            {
                for(j = 0;j < (arr1[i] > arr2[i] ? arr2[i]:arr1[i]);j++)
                    printf("%c",i+ 'a');
            }
        }
        printf("\n");
    }

}