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