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