五世

五 = 王 + 丨 : Mnemonic symbol: a pentagram.

Martin Luther King (王) helps Willy Walrus (w) to construct a pentagram (五) out of dinosaur bones (丨) inside the space station (Ø3).

五 = 工 + 乛 : Mnemonic symbol: a pentagram.

In the space station (Ø3), Willy Walrus (w) chops up a steel beam (工) with a sickle (乛) into five (五) equal parts. He uses the five parts to assemble a steel pentagram (五).

世 = 廿 + L : Mnemonic symbol: the WTO or WHO.

Sherlock Holmes (sh) is cleaning a flower pot (廿) under the shower of the space station's bathroom (Ø4) with a loofah (L) because he didn't quite understand a poster next to the shower from the WHO (世) explaining dangers arising from different germs.

In this case, L is for loofah.