Please answer a question about the following table 

header: Route Number | Route | Via | Operator | Operation row 1 : 25 | Ilford Hainault Street to Oxford Circus | Holborn , Aldgate ,  | First London | 24 Hours. London Buses service.
row 2 : 66 | Leytonstone Station  to Romford Station | Wanstead , Redbridge , G | Arriva London | Daily. London Buses service. Times
row 3 : 86 | Stratford Bus Station to Romford Station | Manor Park, Ilford , Seven Kings | Stagecoach London | Daily. London Buses service. Times
row 4 : 101 | Wanstead Station to Gallions Reach Shopping Centre | Manor Park , East Ham , Beck | Stagecoach London | Daily. London Buses service. Times
row 5 : 123 | Ilford Hainault Street to Wood Green Bus | Gants Hill , Walthamstow | Arriva London | Daily. London Buses service. Times
row 6 : 128 | Claybury Broadway to Romford Station | Barkingside, Gants Hill , Il | Arriva London | 24 Hours. London Buses service.
row 7 : 145 | Leytonstone to Dagenham Asda | Redbridge , Ilford, Becontre | Stagecoach London | Daily. London Buses service. Times
row 8 : 147 | Ilford Hainault Street to Canning Town | East Ham , Newham General Hospital, Custom | Stagecoach London | Daily. London Buses service. Times
row 9 : 150 | Chigwell Row to Becontree Heat | Hainault Barkingside, Gants Hill | Arriva London | Daily. London Buses service. Times
row 10 : 167 | Debden  to Ilford Hainault Street | Loughton , Barkingside, | Blue Triangle | Daily. London Buses service. Times
row 11 : 169 | Barking Town Centre to Clayhall The Glade | Ilford , Newbury Park, Barking | Stagecoach London | Daily. London Buses service. Times
row 12 : 179 | Chingford to Ilford Hainault Street | Woodford Green, South Woodford , G | First London | Daily. London Buses service. Times
row 13 : 247 | Barkingside Station  to Romford Station | Hainault , Collier Row | Stagecoach London | Daily. London Buses service. Times
row 14 : 275 | Walthamstow St James Street Station to | Highams Park, Woodford Green, Wood | Arriva London | Daily. London Buses service. Times
row 15 : 296 | Ilford Sainbury's to Romford | Gants Hill , Newbury Park, Rose | Stagecoach London | Daily. London Buses service. Times
row 16 : 308 | Wanstead Station to Clapton Park Millfield | Forest Gate , Stratford , Le | First London | Daily. London Buses service. Times
row 17 : 362 | Grange Hill  to King George Hospital | Hainault, Marks Gate, Chad | Blue Triangle | Daily. London Buses service. Times
row 18 : 364 | Ilford Hainault Street to Dagenham | Goodmayes , Becontree | Blue Triangle | Daily. London Buses service. Times
row 19 : 366 | Redbridge Falmouth Gardens to Beckton Station | Redbridge , Ilford, Barking | Stagecoach London | Daily. London Buses service. Times
row 20 : 396 | Ilford Sainbury's to King George | Gants Hill , Newbury Park, Little | Stagecoach London | Daily. London Buses service. Times
row 21 : 462 | Hainault The Lowe to Ilford Ha | Grange Hill , Barkingside, G | Arriva London | Daily. London Buses service. Times
row 22 : EL1 | Ilford Station  to Barking Reach | Ilford Lane, Barking , River Road | Blue Triangle | 24 Hours. London Buses service.
row 23 : EL2 | Ilford Station  to Dagenham Dock Station | Barking , Thames View Estate, Dagen | Blue Triangle | Daily. London Buses service. Times
row 24 : W12 | Walthamstow Coppermill Lane to Wa | Walthamstow Central , Whipp | HCT Group | Daily. London Buses service. Times
row 25 : W13 | Woodford Wells to Leytonstone Station | Woodford Green, Snaresbrook  | HCT Group | Daily. London Buses service. Times
row 26 : W14 | Leyton Asda to Woodford Bridge | South Woodford , Wanstead , | Arriva London | Daily. London Buses service. Times
row 27 : W19 | Walthamstow Angel Avenue to Ilford | Walthamstow Central , Leyton | Blue Triangle | Daily. London Buses service. Times

which route numbers begin with w? of these, which are operated by the hct group? of these, takes the walthamstow coppermill lane to wanstead station route?

Answer: W12