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