#include<bits/stdc++.h>
using namespace std;
#define D(x) cout<<#x<<" = "<<x<<endl

string s;
int n, k;
int ck[20];

int dp[11][11];

int solve(int pos, int last)
{
    if(pos == k) return 1;
    if(dp[pos][last]) return dp[pos][last];
    int ret = 0;
    for(int i = 0; i<n; i++)
    {
        if(pos == 0 && s[i] == '0') continue;
        if(ck[i]) continue;
        ck[i] = 1;
        ret += solve(pos+1, i);
        ck[i] = 0;
    }
    return dp[pos][last] = ret;
}


int main()
{
    int t;
    cin>>t;
    while(t--)
    {
        memset(ck, 0, sizeof ck);
        memset(dp, 0, sizeof dp);
        cin>>s;
        n = s.length();
        cin>>k;
        int ans = solve(0, 0);
        cout<<ans<<endl;
    }


    return 0;
}