十
=
一
+
丨
:
Mnemonic symbol: a holy cross. Sherlock Holmes (sh-) is investigating a very strange thing he found in the kitchen of the space station (-2): A big pyramid made of ten (十) crosses (十), which are in turn made out of flutes (一) and dinosaur bones (丨).
lit. you may go undetected during the new moon, but at full moon you'll be found out (idiom) / fig. you can't put it off forever / sooner or later you'll have to deal with it