Standard Regular Expression for Employee ID

[KillerQueen]

I need Standard Regular Expression for Employeed ID like\[code\]EMP015015EMPEMP_015E_015EMP-015EMP.VISEMP/056 \[/code\]Basically it should allow \[code\].\[/code\] or \[code\]_\[/code\] or \[code\]-\[/code\] or \[code\]/\[/code\] in-between alpha-numeric charactersConditions: [*]First character should not be \[code\].\[/code\] or \[code\]_\[/code\] or \[code\]-\[/code\] or \[code\]/\[/code\][*]Length of Employee ID should be 50 characters.