[R] assign

[Val]

Hi all
 I am trying t extract  a variable from a column

      ASk/20005-01-45/90

     Alldatk/25-17-4567/990

I want to assign  a variable to the numbers coming the first"-"

x=01 for the first and
x=17  for teh second

I tried using gsub but did not work

x=gsub("-")

any help?

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