InterviewBit Problems   Valid phone number : Solved

About the Valid phone number : Solved category (1)
Understandable solution (1)
Valid phone number (1)
My solution using Bash and P flag (1)
Not foolproof but simple, skip all the letters, check for digits & then check for "-" (1)
My python 3 solution for this problem (easy) (1)
My Super Simple Solution (1)
My solution for this problem (1)
Grep has no flag -P (5)
Method I used to solve this problem (1)