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