aaaaaaaa [166] – n. unsolvable puzzle left in the wake of a tragedy:
When his wife left the house that morning, her last words were, “I will be your substitute today.” For the rest of his life, he wrestled with the aaaaaaaa [166] of wondering if his wife had some premonition that she would die and he would survive the bombing of Hiroshima.
illustrative haiku by guest artist, Mark Dimor, available here