That is sleep deprivation induced dyslexia.
Should say mnemonic:
Main Entry: 1mne·mon·ic
Pronunciation: ni-'mä-nik
Function: adjective
Etymology: Greek mnEmonikos, from mnEmOn mindful, from mimnEskesthai to remember -- more at MIND
Date: 1753
1 : assisting or intended to assist memory; also : of or relating to mnemonics
2 : of or relating to memory
- mne·mon·i·cal·ly /-ni-k(&-)lE/ adverb