import re

def clean_date_line(line: str) -> str:
    # 1) Replace "1)" with "0"
    cleaned = line.replace("1)", "0")
    
    # 2) Replace "()" with "0"
    cleaned = cleaned.replace("()", "0")
    
    # Clean BB misrecognitions (convert B8, 8B, 88 to BB when followed by digits)
    cleaned = re.sub(r'\b(?:B8|8B|88)(?=\d)', 'BB', cleaned)
    cleaned = re.sub(r'^(?:B8|8B|88)(?=\d)', 'BB', cleaned)
    
    # Clean 012 month misrecognition (e.g. 020122027 -> 02022027)
    cleaned = re.sub(r'(?<!\d)(\d{1,2})012(20\d{2})(?!\d)', r'\g<1>02\g<2>', cleaned)
    cleaned = re.sub(r'(?<!\d)(\d{1,2})([-./\s]+)012([-./\s]+)(20\d{2})(?!\d)', r'\g<1>\g<2>02\g<3>\g<4>', cleaned)
    
    # Clean 112 month misrecognition (e.g. 021122027 -> 02022027)
    cleaned = re.sub(r'(?<!\d)(\d{1,2})112(20\d{2})(?!\d)', r'\g<1>02\g<2>', cleaned)
    cleaned = re.sub(r'(?<!\d)(\d{1,2})([-./\s]+)112([-./\s]+)(20\d{2})(?!\d)', r'\g<1>\g<2>02\g<3>\g<4>', cleaned)
    
    # Run contextual replacements
    for _ in range(3):
        # letter o/O flanked by digits or boundary -> 0
        cleaned = re.compile(r'(\d)[oO](\d|\b)').sub(r'\g<1>0\g<2>', cleaned)
        cleaned = re.compile(r'(\b|\d)[oO](\d)').sub(r'\g<1>0\g<2>', cleaned)
        
        # letter I/i/l/| flanked by digits -> 1
        cleaned = re.compile(r'(\d)[Ii|l](\d|\b)').sub(r'\g<1>1\g<2>', cleaned)
        cleaned = re.compile(r'(\b|\d)[Ii|l](\d)').sub(r'\g<1>1\g<2>', cleaned)
        
        # letter S/s flanked by digits -> 5
        cleaned = re.compile(r'(\d)[Ss](\d|\b)').sub(r'\g<1>5\g<2>', cleaned)
        cleaned = re.compile(r'(\b|\d)[Ss](\d)').sub(r'\g<1>5\g<2>', cleaned)
        
        # letter Z/z flanked by digits -> 2
        cleaned = re.compile(r'(\d)[Zz](\d|\b)').sub(r'\g<1>2\g<2>', cleaned)
        cleaned = re.compile(r'(\b|\d)[Zz](\d)').sub(r'\g<1>2\g<2>', cleaned)
        
        # letter B flanked by digits -> 8
        cleaned = re.compile(r'(\d)B(\d|\b)').sub(r'\g<1>8\g<2>', cleaned)
        cleaned = re.compile(r'(\b|\d)B(\d)').sub(r'\g<1>8\g<2>', cleaned)

    return cleaned

test_cases = [
    "231)92026",
    "23o92026",
    "23O92026",
    "2309202l",
    "2309202I",
    "230920Z6",
    "230920s6",
    "2309202B",
    "BB 231)92026",
    "BB: 23()92026",
    "12010111",
    "B8021122027",
    "88021122027",
    "020122027",
    "BB 02/012/2027",
    "021122027",
    "BB 02/112/2027"
]

for tc in test_cases:
    cleaned = clean_date_line(tc)
    print(f"Original: {tc:<18} -> Cleaned: {cleaned}")