#include <iostream>
#include <string.h>


int convertorForAnswer(int value, char answer[])
{
    char temp;

    for (int i = 1; i < value; i++)
    {
        int j = i;
        temp = answer[j];

        while (--j >= 0 && temp < answer[j])
        {
            answer[j + 1] = answer[j];
        }           
        answer[j + 1] = temp;
    }   

    if (!strcmp(answer, "eorz")) return 0;
    else if (!strcmp(answer, "eno")) return 1;
    else if (!strcmp(answer, "otw")) return 2;
    else if (!strcmp(answer, "eehrt")) return 3;
    else if (!strcmp(answer, "foru")) return 4;
    else if (!strcmp(answer, "efiv")) return 5;
    else if (!strcmp(answer, "isx")) return 6;
    else if (!strcmp(answer, "eenvs")) return 7;
    else if (!strcmp(answer, "eghit")) return 8;
    else if (!strcmp(answer, "einn")) return 9;
    else if (!strcmp(answer, "ent")) return 10;

    return -1;
}

int main()
{
    int value = 0;
    std::cin >> value;

    while (value)
    {
        char firstNumber[6] = {};
        std::cin >> firstNumber;

        char operation = ' ';
        std::cin >> operation;

        char secondNumber[6] = {};
        std::cin >> secondNumber;

        char operation1 = ' ';
        std::cin >> operation1;

        char answerNumber[11] = {};
        std::cin >> answerNumber;


        int first = 0;
        int second = 0;
        int answer = 0;

        int firstLength = 0;
        int secondLength = 0;
        int answerLength = 0;

        firstLength = strlen(firstNumber);
        secondLength = strlen(secondNumber);
        answerLength = strlen(answerNumber);

        first = convertorForAnswer(firstLength, firstNumber);
        second = convertorForAnswer(secondLength, secondNumber);
        answer = convertorForAnswer(answerLength,  answerNumber);

        switch (operation)
        {
        case '+':
        {
            first += second;
        }
            break;
        case '-':
        {
            first -= second;
        }
            break;
        case '*':
        {
            first *= second;
        }
            break;
        }

        if (first > 10 || first < 0 || first != answer)
        {
            std::cout << "No\n";
        }
        else
        {
            std::cout << "Yes\n";
        }
        --value;
    }

    return 0;
}