#include <stdio.h>
#include <string.h>
 
int isPalindrome(const char* str) {
    int left = 0;
    int right = strlen(str) - 1;
 
    while (left < right) {
        if (str[left] != str[right]) {
            return 0;  // 回文ではない場合は0を返す
        }
        left++;
        right--;
    }
 
    return 1;  // 回文の場合は1を返す
}
 
int main() {
    char str[100];
    scanf("%s", str);
 
    if (isPalindrome(str)) {
        printf("%s は回文です\n", str);
    } else {
        printf("%s は回文ではありません\n", str);
    }
 
    return 0;
}
 

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