a = int(input('Enter numeral A: '))
b = int(input('Enter numeral B: '))
c = int(input('Enter numeral C: '))

if a == b:
    print ('A = B')
elif b == c:
    print ('B = C')
elif a == c:
    print ('A = C')
else:
    print ('A, B, C: dinot have couple.')