MOJAB 24

line1 = input("Enter line 1: ")
line2 = input("Enter line 2: ")
line3 = input("Enter line 3: ")

common_chars = []

for char in line1:
    if char in line2 and char in line3 and char not in common_chars:
        common_chars.append(char)

common_chars.sort()
result = ''.join(common_chars)
print(result)