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