#include <stdio.h>
#include <iostream>
char *twostrings(char *s1, char *s2) {
    char *result;
    result = s1;
    while (*s1 != '\0')
        s1++;
        while (*s2 != '\0')
        {
            *s1 = *s2;
            s1++;
            s2++;
        }
        *s1 = 0;
    return result;
}


void main()
{
    char s1[100];
    char s2[100];
    gets_s(s1);
    gets_s(s2);
    printf("%s", twostrings(s1,s2));
    system("pause");

}