puts (0..99).each.map { |x| ((x%10)+ (x/10))%2!=0?format("%.02d", x):nil}.compact.join","
Standard input is empty
01,03,05,07,09,10,12,14,16,18,21,23,25,27,29,30,32,34,36,38,41,43,45,47,49,50,52,54,56,58,61,63,65,67,69,70,72,74,76,78,81,83,85,87,89,90,92,94,96,98