def pr a\x0d (a/6).times{|i|c=i*2+3\x0d if a==a/c*c \x0d return false\x0d end\x0d }\x0d true\x0d end\x0d def ok a\x0d pr(a)&&pr(a+2)\x0d end\x0d 999.times{|i|a=i*2+3\x0d if ok(a)then print a,",",a+2,"\n"\x0d end\x0d }
Note that non-ascii characters in the above source code will be escaped (such as \x9f).