f=$(if $4,$(foreach a,0 $4 $4$4 $4$4$4 $4$3 $3 $3$4 $3$4$4 $3$4$4$4 $4$2,$(call f,$1$(a:0=),$4,$5,$6,$7,$8)),$(info $1))
$(call f,,M,D,C,L,X,V,I)$(info M)