1  Regexp: (\+|-)(0[0-9]|1[0-1])
 2  +01: Ok
 3  -01: Ok
 4  +10: Ok
 5  -10: Ok
 6  Regexp: [+-](0[0-9]|1[0-1])
 7  +01: Ok
 8  -01: Ok
 9  +10: Ok
10  -10: Ok