Regex to check valid Indian driving license number
const regex pattern ( " ^ ( ( [ A - Z ] { 2 } [ 0-9 ] { 2 } ) ( ▁ " " ) | ( [ A - Z ] { 2 } - [0-9 ] { 2 } ) ) " " ( (19 ▁ 20 ) [ 0 - " "9 ] [ 0-9 ] ) [0-9 ] { 7 } $ " ) ;