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#include <iostream>
#include <math.h>
using namespace std;
unsigned int calc(unsigned int k, unsigned int n)
{
        unsigned int kk = k, nn = n;
        while(1)
        {
                if( nn == 0)
                        return 0;
                if( kk%4 == 2 || kk%4 == 3)
                        return nn;
                kk = (kk+3)/4;
                nn--;
        }
}
int main() {
    unsigned int ii, T, n;
    cin >> T;
    while (T>0) {
        cin >> ii >> n;
        cout<<calc(ii, n)<<endl;
        T--;
    }
}
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