def checkAdd(fun, args): A = solution.strange_number(args[0]) B = solution.strange_number(args[1]) return str(A+B)
def checkNegative(fun, args): A = solution.strange_number(args) return A[-1]
def checkStr(fun, args): return str(solution.strange_number(args))
def checkPositive(fun, args): A = solution.strange_number(args) return A[1]