VLAN activation DHCP router cisco

[DA3M0N]

Hello, I'm currently taking a computer science course and I need to use a cisco router to use the DHCP protocol to automatically assign ip addresses to two vlan on actives on a switch. The switch is well configured, the switch and router are connected in RJ45 on their trunk ports, I have declared vlan 10-20 in VLAN_A and VLAN_B on the switch, the problem is that I can not access the "conf-subif" commands such as "int gi 1.10" does not work. I do not understand where the error comes from, I follow the tutorial present on cisco.
I'm attaching a screenshot of my commands and the link to the tutorial I'm following.

Translated with DeepL.com (free version)

Tuto VLAN router

Please help me

[MHM Cisco World]

Cisco interface use number x/x not x

That why when you enter e 1.10 is reject 

You need to see how router number it port

Do

Show interface and check 

MHM

[Gopinath_Pigili]

Hello DA3M0N ,

May i know the router series or model number?

Router# show version

Thanks

[balaji.bandi]

can you post show ip interface brief (then use the correct interface for sub-interface as mentioned in the document)