#include <stdio.h>

int main()
{
    int y=0;
    char a[100];
    scanf("%s", a);

    if(a[0]==a[2])
    {
        printf("");
    }
/*
    int * ptr1 = &a[0];
    int * ptr2 = &a[5];


    for(int f=0; f<3; f++)
    {
        y = *(ptr1+f);
        *(ptr1+f) = *(ptr2-f);
        *(ptr2-f) = y;
    }
    */
        printf("%s ", a);

    
}

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