import math
def main():
    print 'Please input all bits as strings, and separate by commas'
    for loop in range(1,6):
        bits = []
        output = ''
        stars = 0
        inputL = input('Input ' + str(loop) + ': ')
        for x in inputL[1:]:
            bits.append(str(x))
        bitlen = len(bits[0])
        bitnum = len(set(bits))
        for x in range(bitlen):
            num = bits[0][x]
            same = True
            for y in range(1,bitnum):
                if num != bits[y][x]:
                    output += '*'
                    stars += 1
                    same = False
                    break
            if same:
                output += num
        if bitnum < math.pow(2,stars):
            print 'NONE'
        else:
            print output
    raw_input()
main()