$4^{th}$ Question:

Recognizable languages have enumerators. Suppose that language

Lsube${}^{**}$ has recognizer machine $M$ and consider the construction of an enumerator for $L$ discussed in lecture $19,$ using the shortlex ordering $s_0,s_1,s_2,$dots of ${}^{**},$ together with clocks.

A guru predicted the following table of behaviors of $M$ on strings $s_0,s_1,s_2,$dots

$\backslash$table$[[s_0,s_1,s_2,s_3,s_4,s_5,$dots