python - if statement not reading characters in string -

i working on program determine if license plate in correct order using python 3.4 (i beginning programming, , doing self assigned home work).

the license plate should in order of 3 letters, , 3 numbers correct order.

this code:

#get data user plate = input('enter lisence plate number: ')  #determine if style old or new if len(plate) == 6 , plate[0] >= "a" , plate[0] <= "z"\    , plate[1] >= "a" , plate[1] <= "z"\    , plate[2] >= "a" , plate[2] <= "z"\    , plate[3] >= "0" , plate[1] <= "9"\    , plate[4] >= "0" , plate[4] <= "9"\    , plate[5] >= "0" , plate[5] <= "9":     verd = 'works' else:      verd = 'not work'  #print results     print(verd) 

when enter license plate abc123, telling me doesn't work.

i have been trying everything, , can not figure out why isn't working.

any appreciated.

by way, error in method in third condition -

and plate[3] >= "0" , plate[1] <= "9"   <-------- notice using `plate[1]` instead of [3] 

change -

and plate[3] >= "0" , plate[3] <= "9"