C132233133112121111331333133313331333132313231332113313232212221   >>    C13223313311212111133133313331333133313231323133211331323221222   <<    C132233133112121111331333133313331333132313231332113313232212223   >>      C132233133112121111331333133313331333132313231332113313232212222   >>