bool isSubset(char* arr, char ch, int i = 0)
{
    if (ch == arr[i])
        return true;
    else if (arr[i] == '\0')
        return false;
    return isSubset(arr, ch, ++i);
}

bool areEqSets(char* firstArr, char* secondArr, int i = 0, bool firstFlag = false, bool secondFlag = false)
{
    if (!firstFlag && firstArr[i] != ' ' && !isSubset(secondArr, firstArr[i]))
        return false;
    if (!secondFlag && secondArr[i] != ' ' && !isSubset(firstArr, secondArr[i]))
        return false;

    if (!firstFlag && firstArr[i] == '\0')
        firstFlag = true;

    if (!secondFlag && secondArr[i] == '\0')
        secondFlag = true;

    if (firstFlag && secondFlag)
        return true;

    return areEqSets(firstArr, secondArr, ++i, firstFlag, secondFlag);
}