Just golfing your code further gets me 72:

#0        1         2         3         4         5         6         
+7
#123456789012345678901234567890123456789012345678901234567890123456789
+012

for$i(@x=grep$_[0]%4==$_%4,0..39){map{print"$i-",($_+2)%40,"-$_[0]\n"}
+@x}

[download]

Update: I think I have had a Masterlock with the first number equal to the last.

In reply to Re: (Golf) Master lock combinations by kaif
in thread (Golf) Master lock combinations by Anonymous Monk

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