include <bits/stdc++.h>

using namespace std;

int main(){
char s;
cin>>s;
printf(" %c \n",s);
printf(" %c %c \n",s,s);
printf(" %c %c %c \n",s,s,s);
printf(" %c %c %c %c \n",s,s,s,s);
printf("%c %c %c %c %c\n",s,s,s,s,s);
}
最笨的一种解法