予行 is read as よこう (yokou) and means rehearsal.
よこう
yokou
よさんしっこうちょうさ
survey of expenditure
よこうれんしゅう
dry run
ぎょうじよてい
schedule of events
せんこうよやく
advance reservation
しっこうゆうよ
stay of execution
よてい
plans
よせん
preliminary contest
よやく
programming (e.g. a device)
よそう
expectation
よび
preparation
よほう
forecast
よち
foresight