#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() //32 using namespace std; int main(){ char a,b,c; cin>>a; if (a>=97){ b=a-32; cout<<b; } else { c=a+32; cout<<c; } return 0; }