Răspuns :
a.) <FAB, <BAF, <CDE, <EDC
b.) <AFE, < ABC, <DEF, < DCB, < EFA, < CBA, <FED, <BCD
c.) <BFE, <EFB, <FBC, <CBF, <FEC, <CEF, <ECB, <BCE.
a.) <FAB, <BAF, <CDE, <EDC
b.) <AFE, < ABC, <DEF, < DCB, < EFA, < CBA, <FED, <BCD
c.) <BFE, <EFB, <FBC, <CBF, <FEC, <CEF, <ECB, <BCE.