#include<iostream>
using namespace std;
int count_two(int n,int m){int count=0;for(int i=0;i<m;i++){ //统计2的因子个数 int num=n-i;while(num%2==0){count++;num /=2;}}return count;
}
int main(){int n,m;while(1){cin >> n >> m;if(n==0 && m==0)break;int cnt=count_two(n,m);cout << cnt << endl ;	}return 0;
}