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