백준 9086번 문자열

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

#define SIZE 1000

int main(void)
{
    char s1[SIZE];
    char head;
    char tail;
    int length;
    int t;
    int idx;

    scanf("%d", &t);

    for (idx = 0; idx < t; idx++)
    {
        scanf("%s",&s1);
        length = strlen(s1);
        head = s1[0];
        tail = s1[length-1];
        printf("%c%c\n",head,tail);
    }
}