Mnemonic symbol: a step with the right foot is a kick of a righteous knight, who wears a full armor boot on his right foot.
Someone is playing music on a flute (一) for Chantal Chicken (chu) in the space station's bathroom (Ø4) so that she can practice pole dancing on a huge nail (丁). She's working on her step with the right foot (亍) while wearing a full armor boot (mnemonic symbol for 亍).