Unable to login from one instance to another using AWS instances

Hi DURGA

i am trying to login from one host to another using ssh. but it is asking for password.can you please help

i have used ssh-add

jagadeesh:Desktop jagadeeshyadav$ ssh-add -K cdh55.pem
Identity added: cdh55.pem (cdh55.pem)
jagadeesh:Desktop jagadeeshyadav$ ssh -A root@ec2-54-183-239-174.us-west-1.compute.amazonaws.com
[root@ip-172-31-0-112 ~]#
[root@ip-172-31-0-112 ~]# ssh root@ec2-54-215-136-14.us-west-1.compute.amazonaws.com
The authenticity of host ‘ec2-54-215-136-14.us-west-1.compute.amazonaws.com (172.31.0.128)’ can’t be established.
RSA key fingerprint is 69:12:26:54:57:83:bf:13:a3:b5:73:97:4c:19:ac:54.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘ec2-54-215-136-14.us-west-1.compute.amazonaws.com,172.31.0.128’ (RSA) to the list of known hosts.
root@ec2-54-215-136-14.us-west-1.compute.amazonaws.com’s password:

tried with another instance

[root@ip-172-31-0-112 ~]# ssh root@ip-172-31-10-96.us-west-1.compute.internal
The authenticity of host ‘ip-172-31-10-96.us-west-1.compute.internal (172.31.10.96)’ can’t be established.
RSA key fingerprint is 87:b4:ec:0d:d2:15:4f:74:b6:28:47:d7:1a:3a:98:ce.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘ip-172-31-10-96.us-west-1.compute.internal,172.31.10.96’ (RSA) to the list of known hosts.
root@ip-172-31-10-96.us-west-1.compute.internal’s password:

[