tibetan-precomposed-regexp

tibetan-precomposed-regexp is a variable defined in `tibetan.el'.
Its value is

"^\\(phyw\\|tshw\\|rtsw\\|khw\\|nyw\\|tsw\\|zhw\\|shw\\|khy\\|phy\\|khr\\|thr\\|phr\\|shr\\|dzr\\|grw\\|rng\\|rny\\|rts\\|rdz\\|rgw\\|rky\\|rgy\\|rmy\\|lng\\|sng\\|sny\\|sts\\|sky\\|sgy\\|spy\\|sby\\|smy\\|skr\\|sgr\\|snr\\|spr\\|sbr\\|smr\\|kw\\|gw\\|cw\\|tw\\|dw\\|zw\\|rw\\|lw\\|sw\\|hw\\|ky\\|gy\\|py\\|by\\|my\\|kr\\|gr\\|tr\\|dr\\|pr\\|brk\\|brg\\|brng\\|brj\\|brny\\|brt\\|brd\\|brn\\|brts\\|brdz\\|brl\\|br\\|mr\\|sr\\|hr\\|jr\\|kl\\|gl\\|blt\\|bld\\|bl\\|zl\\|rl\\|sl\\|rk\\|rg\\|rj\\|rt\\|rd\\|rn\\|rb\\|rm\\|lk\\|lg\\|lc\\|lj\\|lt\\|ld\\|ln\\|lp\\|lb\\|lh\\|sk\\|sg\\|st\\|sd\\|sn\\|sp\\|sb\\|sm\\)"

Documentation:
Regexp string to match a romanized Tibetan complex consonant.
The result of matching is to be used for indexing alists when the input key
from an input method is converted to the corresponding precomposed glyph.