C1111233131211111211113313331333133313232321333131333132313232223231   >>    C111123313121111121111331333133313331323232133313133313231323222323   <<    C1111233131211111211113313331333133313232321333131333132313232223233   >>      C1111233131211111211113313331333133313232321333131333132313232223232   >>