#include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ char a; a=cin.get(); 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; }