#include <iostream> using namespace std; int main() { string s; int n; cin>>s; while((s.size()%3!=0)){ s='0'+s; } int l=s.size(); for(int i=0;i<l-2;i=i+3){ n=(s[i]-'0')*4+(s[i+1]-'0'); cout<<n; } return 0; }