@ponapalt Zi found that the description of undefined variables in yaya in the AYAYA wiki does not match its actual behaviour, and I was wondering if we should change the wiki or the source code of yaya 
https://emily.shillest.net/ayaya/?%E3%83%9E%E3%83%8B%E3%83%A5%E3%82%A2%E3%83%AB/%E6%96%87%E6%B3%95/4.%E6%BC%94%E7%AE%97#q7b01c6f
According to the wiki, undefined variables should be represented as strings and not as integers
@steve02081504 We need to consider other examples of computational priorities or stop providing examples.