#include <functional>
#include <algorithm>
#include <iostream>
#include <fstream>
#include <sstream>
#include <iomanip>
#include <numeric>
#include <cstring>
#include <cassert>
#include <cstdio>
#include <string>
#include <vector>
#include <bitset>
#include <queue>
#include <stack>
#include <cmath>
#include <ctime>
#include <list>
#include <set>
#include <map>

using namespace std;

#define DO(n) for ( int ____n ## __line__ = n; ____n ## __line__ -- ; )

#define ALL(A) A.begin(), A.end()
#define BSC(A, x) (lower_bound(ALL(A), x) - A.begin())
#define CTN(T, x) (T.find(x) != T.end())
#define SZ(A) int(A.size())
#define PB push_back
#define MP(A, B) make_pair(A, B)
#define fi first
#define se second

typedef long long LL;


typedef vector<int> VI;
typedef map<int, int> MII;
typedef pair<int, int> PII;
typedef pair<LL, LL> PLL;



template<class T> inline void RST(T &A){memset(A, 0, sizeof(A));}
template<class T> inline void FLC(T &A, int x){memset(A, x, sizeof(A));}
template<class T> inline void CLR(T &A){A.clear();}

//}

/** Constant List .. **/ //{

const int dx4[] = {-1, 0, 1, 0};
const int dy4[] = {0, 1, 0, -1};

const int dx8[] = {-1, 0, 1, 0 , -1 , -1 , 1 , 1};
const int dy8[] = {0, 1, 0, -1 , -1 , 1 , -1 , 1};

const int dxhorse[] = {-2 , -2 , -1 , -1 , 1 , 1 , 2 , 2};
const int dyhorse[] = {1 ,  -1 , 2  , -2 , 2 ,-2 , 1 ,-1};

const int MOD = 1000000007;
//int MOD = 99990001;
const int INF = 0x3f3f3f3f;
const LL INFF = 1LL << 60;
const double EPS = 1e-9;
const double OO = 1e15;
const double PI = acos(-1.0); //M_PI;

//}

template<class T> inline void checkMin(T &a,const T b){if (b<a) a=b;}
template<class T> inline void checkMax(T &a,const T b){if (a<b) a=b;}
//}
template<class T> inline T low_bit(T x) {return x & -x;}
/*****************************************************************/

/* .................................................................................................................................. */
const int N = 1e5 + 9;
char a[N];
int K;
int head;
int cnt[256] , n;
LL ans;
void solve(){
    RST(cnt);
    scanf("%s" , a);
    scanf("%d" , &K);
    n = strlen(a);
    head = 0;
    ans = 0;
    for (int i = 0 ; i < n ; ++i){
        ++cnt[a[i]];
        while (cnt[a[i]] > K){
            --cnt[a[head]];
            ++head;
        }
        ans += i - head + 1;
    }
    printf("%I64d\n" , ans);
}
int main(){
    int _;
    scanf("%d" , &_);
    while (_--)solve();
}