123
The two letters that mean to rot are "D" and "E".
You would spell it as so: "Rot in Hell", 'Rot' and 'Hell' both capitalized since 'Rot' is the beginning of the phrase, and 'Hell' since it is a place.
The anagram of RETROT Is "retort." You can also spell the shorter words retro, otter, tore, tote, trot, tort, err, rot, tot, or, and to.
One hundred and twenty three = 123
Those letters spell natural.
Hot, tow, hen, her, when, went, to, row, rot, not, ton, net
The letters in "these letters" can spell the phrase "ether settles." The letters can spell shorter words such as trestles, sheerest, shelters, and treeless.
Those letters will spell dollar.
The letters spell 'broccoli'.
Those letters spell delicate.
Those letters spell psycho.
Those letters will spell carnivore.