#include <iostream>
using namespace std;

int main()
{
    int a=0;
    char ziMu1;
    char dengYu;
    char ziMu2;
    char douHao;
    int b=0;
    cin>>ziMu1>>dengYu>>a>>douHao>>ziMu2>>dengYu>>b;
    int temp=0;
    temp=a;
    a=b;
    b=temp;
    cout<<ziMu1<<dengYu<<a<<douHao<<ziMu2<<dengYu<<b<<endl;
    return 0;
}