C1111233131211111211113313331333132313231323223313331311211313222321   >>    C111123313121111121111331333133313231323132322331333131121131322232   <<    C1111233131211111211113313331333132313231323223313331311211313222323   >>      C1111233131211111211113313331333132313231323223313331311211313222322   >>