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