C3121113331313231323132333131313231323131323223313233313233313233313132212121
>>
C312111333131323132313233313131323132313132322331323331323331323331313221212
<<
C3121113331313231323132333131313231323131323223313233313233313233313132212123
>>
C3121113331313231323132333131313231323131323223313233313233313233313132212122
>>