if the character of s2 is not present in S1 , then check if previous two ASCII characters are present in S1
elif ( mp [ chr ( ord ( S2 [ i ] ) - 1 ) ] and mp [ chr ( ord ( S2 [ i ] ) - 2 ) ] ) : NEW_LINE INDENT mp [ chr ( ord ( S2 [ i ] ) - 1 ) ] -= 1 NEW_LINE mp [ chr ( ord ( S2 [ i ] ) - 2 ) ] -= 1 NEW_LINE DEDENT else : NEW_LINE INDENT return False NEW_LINE DEDENT return True NEW_LINE