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