///...................SUBHASHIS MOLLICK...................///
///.....DEPARTMENT OF COMPUTER SCIENCE AND ENGINEERING....///
///.............ISLAMIC UNIVERSITY,BANGLADESH.............///
///....................SESSION-(14-15)....................///
#include<bits/stdc++.h>
using namespace std;
#define sf(a) scanf("%lld",&a)
#define sf2(a,b) scanf("%lld %lld",&a,&b)
#define sf3(a,b,c) scanf("%lld %lld %lld",&a,&b,&c)
#define pf(a) printf("%lld",a)
#define pf2(a,b) printf("%lld %lld",a,b)
#define pf3(a,b,c) printf("%lld %lld %lld",a,b,c)
#define nl printf("\n")
#define ll long long
#define pb push_back
#define MPI map<int,int>mp;
#define fr(i,n) for(i=0;i<n;i++)
#define fr1(i,n) for(i=1;i<=n;i++)
#define frl(i,a,b) for(i=a;i<=b;i++)
//freopen("Input.txt","r",stdin);
//freopen("Output.txt","w",stdout);
//const int fx[]={+1,-1,+0,+0};
//const int fy[]={+0,+0,+1,-1};
//const int fx[]={+0,+0,+1,-1,-1,+1,-1,+1}; // Kings Move
//const int fy[]={-1,+1,+0,+0,+1,+1,-1,-1}; // Kings Move
//const int fx[]={-2, -2, -1, -1, 1, 1, 2, 2}; // Knights Move
//const int fy[]={-1, 1, -2, 2, -2, 2, -1, 1}; // Knights Move
main()
{
long long ts;
cin>>ts;
while(ts--)
{
string s;
long long len,a,b,i,length,j;
cin>>s>>len;
len++;
length=s.size();
vector<char>vec,permut_vec;
for(i=0; i<s.size(); i++)
{
vec.push_back(s[i]);
}
long long fact[length];
fact[0]=1;
for(j=1; j<length; j++)
{
fact[j]=fact[j-1]*j;
}
sort(vec.begin(),vec.end());
while(!vec.empty())
{
a=fact[vec.size()-1];
b=(len-1)/a;
permut_vec.push_back(vec[b]);
vec.erase(vec.begin()+b);
len=len-(a*b);
}
for(i=0; i<permut_vec.size(); i++)
{
cout<<permut_vec[i];
}
cout<<endl;
}
}
///.....DEPARTMENT OF COMPUTER SCIENCE AND ENGINEERING....///
///.............ISLAMIC UNIVERSITY,BANGLADESH.............///
///....................SESSION-(14-15)....................///
#include<bits/stdc++.h>
using namespace std;
#define sf(a) scanf("%lld",&a)
#define sf2(a,b) scanf("%lld %lld",&a,&b)
#define sf3(a,b,c) scanf("%lld %lld %lld",&a,&b,&c)
#define pf(a) printf("%lld",a)
#define pf2(a,b) printf("%lld %lld",a,b)
#define pf3(a,b,c) printf("%lld %lld %lld",a,b,c)
#define nl printf("\n")
#define ll long long
#define pb push_back
#define MPI map<int,int>mp;
#define fr(i,n) for(i=0;i<n;i++)
#define fr1(i,n) for(i=1;i<=n;i++)
#define frl(i,a,b) for(i=a;i<=b;i++)
//freopen("Input.txt","r",stdin);
//freopen("Output.txt","w",stdout);
//const int fx[]={+1,-1,+0,+0};
//const int fy[]={+0,+0,+1,-1};
//const int fx[]={+0,+0,+1,-1,-1,+1,-1,+1}; // Kings Move
//const int fy[]={-1,+1,+0,+0,+1,+1,-1,-1}; // Kings Move
//const int fx[]={-2, -2, -1, -1, 1, 1, 2, 2}; // Knights Move
//const int fy[]={-1, 1, -2, 2, -2, 2, -1, 1}; // Knights Move
main()
{
long long ts;
cin>>ts;
while(ts--)
{
string s;
long long len,a,b,i,length,j;
cin>>s>>len;
len++;
length=s.size();
vector<char>vec,permut_vec;
for(i=0; i<s.size(); i++)
{
vec.push_back(s[i]);
}
long long fact[length];
fact[0]=1;
for(j=1; j<length; j++)
{
fact[j]=fact[j-1]*j;
}
sort(vec.begin(),vec.end());
while(!vec.empty())
{
a=fact[vec.size()-1];
b=(len-1)/a;
permut_vec.push_back(vec[b]);
vec.erase(vec.begin()+b);
len=len-(a*b);
}
for(i=0; i<permut_vec.size(); i++)
{
cout<<permut_vec[i];
}
cout<<endl;
}
}
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