#include<stdio.h>
int main(){
	char a[100]={0};
	char ch;
	int i=0;
	while(scanf("%c",&ch)){
		if(ch==EOF ||ch=='\n') break;
		a[i++]=ch;
	}
	i--;
	for(;i>=0;i--) printf("%c",a[i]);
	return 0;
}