\+the literal + (4310 / 538 / 2B16)
\da digit
-the literal - (4510 / 558 / 2D16)
\d{3}a digit, repeated exactly 3 times
-the literal - (4510 / 558 / 2D16)
\d{3}a digit, repeated exactly 3 times
-the literal - (4510 / 558 / 2D16)
\d{4}a digit, repeated exactly 4 times