//

#include <iostream>

#include <cstring>

#include <vector>

#include <cmath>

using namespace std;

char GetDigitChar(int val)

{

    if(val >=  && val <= )        return val + '';

    else if(val >=  && val < )    return val -  + 'A';

    return '\0';

}

int GetDigitVal(char c)

{

    c = toupper(c);

    if( c >= '' && c <= '')        return c - '';

    else if(c >= 'A' && c <= 'Z')    return c - 'A' + ;

    return ;

}

void num_conv(string &str, int r, int s)

{

    int strLen = str.length();

    //    Convert string to val first

    vector<int> origVal;

    origVal.reserve(strLen);

    for(int i = ; i < strLen; i ++)

    {

        origVal.push_back(GetDigitVal(str[i]));

    }

    //    Go

    vector<char> ret;    

    int currStartInx = ;

    bool bAllDone = false;

    while(currStartInx < strLen && !bAllDone)

    {

//        cout << "Start from " << currStartInx << endl;

        for(int i = currStartInx; i < strLen;i++)

        {

//            cout << "\t Curr Digit: " << origVal[i] << endl;

            int quo =  origVal[i] / s;

            int rem =  origVal[i] % s;

//            cout << "\t Quo: " << quo << " Rem: " << rem << endl;

            origVal[i] = quo;

            //    The digit to record

            if(i == strLen - )

            {

                ret.push_back(GetDigitChar(rem));

//                cout << "!" << GetDigitChar(rem) << endl;

                bAllDone = (currStartInx == (strLen - ) && quo ==  )? true: false;

                break;

            }

            //    Add remainer to next digit

            if(rem > )

            {

//                cout << "\tAdding rem "    << r * rem << " = ";

                origVal[i+] += r * rem;

//                cout << origVal[i+1] << endl;

            }            

            if(i == currStartInx)

            {

                currStartInx += quo == ?  : ;

            }

        }// for

    }// while

    //    Output

    for(int i = ret.size() - ; i >=; i --)

    {

        cout << ret[i];

    }

    cout << endl;

}

int main()

{

    int runcnt = ;

    cin >> runcnt;

    while(runcnt--)

    {

        string strnum;

        int r, s;

        cin >> strnum >> r >> s;

        num_conv(strnum, r, s);

    }

    return ;

}