RLH meaning in Messaging ?

"Run Like Hell" is a song by the English progressive rock band Pink Floyd, written by David Gilmour and Roger Waters. It appears on the album The Wall. It was released as a single in 1980, reaching #15 in the Canadian singles chart as well as #18 in Sweden, but only reached #53 in the U.S. A 12" single of "Run Like Hell," "Don't Leave Me Now" and "Another Brick in the Wall (Part 2)" peaked at #57 on the Disco Top 100 chart in the U.S. To date, it is the last original composition written by both Gilmour and Waters, the last of such under the Pink Floyd banner, and is the last composition ever recorded by all four members of the classic 70s-era Floyd lineup together, within their traditional instrumental roles of Waters on bass, Gilmour on guitars, Nick Mason on drums, and Richard Wright on keyboards, on the same song.