#include <stdio.h>
#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000000
#define Inf64 1000000000000000001LL

int main(){
	string a,b;
	cin>>a;
	while(isdigit(a.back())){
		b.insert(b.begin(),a.back());
		a.pop_back();
	}
	cout<<string(a.rbegin(),a.rend())+b<<endl;
	
	return 0;
}