LINE BOT
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@momo : call momo
@r[array] : return one element in array
@food || @밥집 : return food list
@reserve cron, message : reserve schedule
@reserve cron, message -once : reserve schedule onetime
@reserve -l : show schedule
@reserve -r id : remove schedule
@help || @h : view action list of momo
@contact || @ct : view information of momo's developer