#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() using namespace std; char a1[1000001]={},a2[1000001]={}; int main(){ cin>>a1; int i=0; while(a1[i]!='\0'){ if(a1[i]>=65){ a2[i]=a1[i]; } } cout<<a2; return 0; }