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