#include <stdio.h>

int main() {
    char arr1[20], arr2[20];
    int cnt = 0; //cnt: 글자 수
    
    scanf("%s", arr1);

    for(int i = 0; arr1[i] != '\0'; i++)
        cnt++; //글자 수 Array = 5

    for(int i = cnt-1, j = 0; i >= 0 && j < cnt; i--, j++) { //cnt = 5
        arr2[j] = arr1[i];
    }
    
    arr2[cnt] = '\0';
    printf("%s", arr2);
    
    return 0;
}

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