a=4/9;36.step(0x75,2*a){|j|putc j}until 8<a+=1 #460 = 46 x 10
#a=4/9;36.step(0x75,2*a){|j|$><<j.chr}until 8<a+=1 #490 = 49 x 10
#a=0;36.step(0x75,2*a+=1){|j|$><<j.chr}while 8>a 564 = 47 x 12
#8.times{|a|36.step(0x75,2*-~a){|j|$><<j.chr}} #630 = 45 x 14
#(0..327).map{|b|d=b%41;$><<(d*2+36).chr[d%-~(b/41)]} 988 = 52 x 19
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