C1111233131211111211113313331333132313231323223313223313121123231   >>    C111123313121111121111331333133313231323132322331322331312112323   <<    C1111233131211111211113313331333132313231323223313223313121123233   >>      C1111233131211111211113313331333132313231323223313223313121123232   >>