Trim in/out point of Layer A to match Layer B?

how script or tip trim in/out point of layer match layer b?

 

like trim solid , trim adj layer, existing precomps/layers.

 

i doing this

 

select layer a  i

select layer b option-[

select layer a  o

select layer b option-]

 

but... need 200 times.

 

so script thing can me out?  like, select 2 layers, , it'll auto trim bottom layer's in/out point match top's.

oh, nevermind! brain turning mush in wee hours.

 

i found trim layer above / trim layer below scripts lloyd alvarez.

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