#include<iostream> using namespace std; int main(){ char a[1000000]; cin>>a; int n=0; int y=0; for(int i=0;i<1000000;i++){ if(a[i]==' '){ break; } y++; } for(int i=0;i<y;i++){ if(a[i]=='1'||a[i]=='2'||a[i]=='3'||a[i]=='4'||a[i]=='5'||a[i]=='6'||a[i]=='7'||a[i]=='8'||a[i]=='9'||a[i]=='0'){ n++; } } cout<<n; }