B231123233313231323132233133313233313232233132313231333133313231323132322121
>>
B23112323331323132313223313331323331323223313231323133313331323132313232212
<<
B231123233313231323132233133313233313232233132313231333133313231323132322123
>>
B231123233313231323132233133313233313232233132313231333133313231323132322122
>>