C1111233131211111211113313331323133313231323211331323133313331313221221   >>    C111123313121111121111331333132313331323132321133132313331333131322122   <<    C1111233131211111211113313331323133313231323211331323133313331313221223   >>      C1111233131211111211113313331323133313231323211331323133313331313221222   >>