实验11-1-9 藏尾诗 (20分)

#include<stdio.h>
#include<ctype.h>
#include<string.h>
#include<math.h>
#include<stdlib.h>
int main()
{    
    char arr[4][30], result[9];
    int i, j = 0, len;
    for ( i = 0; i < 4; i++)
        scanf("%s", arr[i]);
    for (i = 0; i < 4; i++){
        len =strlen(arr[i]);
        result[j++] = arr[i][len - 2];
        result[j++] = arr[i][len - 1];
    }
    result[j] = '\0';
    printf("%s\n", result);
    return 0;
}