from itertools import combinations_with_replacement

operatorCnt = 0
print("enter your calculation with ? for the unknown operators")
instr = input()
print("enter the solution")
solution = input()
print("your input was:",instr, "=", solution)

for char in instr:
        if char == '?':
                operatorCnt += 1
possibleOperators = combinations_with_replacement('+-*/', operatorCnt )
for combination in possibleOperators:
        i = 0
        teststr = ""
        for char in instr:
                if char == '?':
                        teststr += combination[i]
                        i += 1
                else:
                        teststr += char
        if eval(teststr) == float(solution):
                print("Found solution", teststr)