Hi Group,

 I have a question on Stringr package

 I have a table like this
 X     Y
 ab    su - di
 ac    pi - tu
 ad    tu - tu

 I want output like this
  X        Y
ab         su
ab         di
ac         pi
ac         tu
ad         tu
ad         tu

 I am wondering if this operation can be done using stringr package (only)
?

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