1
 2
 3
 4
 5
 6
 7
 8
 9
10

Regexp: (\+|-)(0[0-9]|1[0-1])
+01: Ok
-01: Ok
+10: Ok
-10: Ok
Regexp: [+-](0[0-9]|1[0-1])
+01: Ok
-01: Ok
+10: Ok
-10: Ok