A

BCE

CDF

ABDEF

B

ACE

ABCDF

DEF

C

ABE

ADF

BCDEF

D

ABCDE

ACF

BEF

E

ABC

ACDEF

BDF

F

ABCEF

ACD

BDE

AE

BC

CDEF

ABDF

AF

BCEF

CD

ABDE

BD

ACDE

ABCF

EF

AB

CE

BCDF

ADEF

AC

BE

DF

ABCDEF

AD

BCDE

CF

ABEF

BF

ACEF

ABCD

DE

ABD

CDE

BCF

AEF

ABF

CEF

BCD

ADE