#include<bits/stdc++.h> using namespace std; int main(){ char a; cin>>a; if((a-1)>=32 and (a-1)>=126){ cout<<a-1; } else{ cout<<"Input Error!"<<endl; } if((a+1)>=32 and (a+1)>=126){ cout<<a+1; } else{ cout<<"Input Error!"; } return 0; }