C k f 1

C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1
C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1
C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1C k f 1