#include<cstdio> #include<iostream> using namespace std; int main() { for(char i=97;i<=122;i++) { cout<<i<<","; } cout<<" "; for(char j=90;j>=65;j--) { cout<<j<<","; } /* int n,m; cin>>n>>m; for(char i=n+96;i<=m+96;i++) { cout<<i<<" "; } */ return 0; }