13
String
#include <stdio.h>
#include <string.h>
int main(void) {
    char buf[1001];
    char buf2[1001];
    char buf3[1001];
    scanf("%1000s",buf);
    scanf("%1000s",buf2);
    strcpy(buf3,buf);
    strcat(buf3,buf2);
    puts(buf3);
    return 0;
}