#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;
}

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