{for(x=4e3;$i||--x>i=r=!++$(15-r);r+=r+(0<t=x/70-$(i-6))*(0<=q=x%70-$(i-4))*(t<$(i-2)&&q<$i))i+=8}$0="ab "$3+$1" ac "$5+$1" bc "$9+$1" abc "0+$1