题解

#include<bits/stdc++.h>
using namespace std;
int main()
{
char c;
cin>>c;
cout<<" "<<c<<" "<<endl;
cout<<" "<<c<<c<<c<<" "<<endl;
cout<<c<<c<<c<<c<<c<<endl;
cout<<" "<<c<<c<<c<<" "<<endl;
cout<<" "<<c<<" "<<endl;
}