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There is an old crossword joke that depends, crucially, on a reliable straight man:
Crossword clue: The overloaded postman
Straight man: How many letters?
Cunning cruciverbalist: Too many
If you think crosswords are difficult, read this hadith and try to work out the number of letters and total reward:
The Messenger of Allah S.W.T. said: "Whoever reads a letter from the Book of Allah, he will have a reward. And that reward will be multiplied by ten. I am not saying that "Alif, Laam, Meem" is a letter, rather I am saying that "Alif" is a letter, "laam" is a letter and "meem" is a letter."
Reported by at-Tirmidhi on the authority of 'Abd Allah b. Mas'ud and it is a sound hadith.
But if "laam" is a letter, what's "l" and what's "a"?