$\parallel {\mathit{P}}^0\parallel$	$\parallel {\mathit{P}}^{\infty }\parallel$	$\parallel {\mathit{P}}^1\parallel$
${sup}_{A}d(.)$	${sup}_{B}d(.)$	${sup}_{C}d(.)$
A	B	C
abc	abc	abc
acb	acb
bac	bac	bac
bca	bca
cab	cab	cab
cba	cba	cba