Count the Overlap by llhuii

{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

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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