"It was around this time that I started separating the alphabet into good letters, V as well as M, and bad letters, S, F and T, plus the terrible vowel sounds..."

"... open and mysterious and nearly impossible to wrangle. Each letter had a degree of difficulty that changed depending upon its position in the sentence. Much later when I read that Nabokov as a child assigned colors to letters, it made sense to me that the hard G looked like 'vulcanized rubber' and the R, 'a sooty rag being ripped.' My beloved V, in the Nabokovian system, was a jewel-like 'rose quartz.'"

From "My Stutter Made Me a Better Writer/At times it caused suffering, but it also gave me a passion for words and language" by Darcey Steinke (NYT).