C1111233131211111211113313331333132313231323223313331323211231221   >>    C111123313121111121111331333133313231323132322331333132321123122   <<    C1111233131211111211113313331333132313231323223313331323211231223   >>      C1111233131211111211113313331333132313231323223313331323211231222   >>