Print one side, turn the paper over and print the second side in the same direction.

 "E" signs. Informative signs

Side a Sign E1 to E5
Side b Text E5 to E5.1

Side a Sign E5.2 to E5.9
Side b Text E5.2 to E5.9

Side a Sign E5.10 to E7
Side b Text E5.10 to E7

Side a Sign E7.1 to E12
Side b Text E7.1 to E12

Side a Sign E13 to E20
Side b Text E13 to E20

Side a Sign E21 to Aux2
Side b Text E21 to Aux2