RSA Encryption

I have two messages that need to be decoded

Recall that so that we would not have 1^ any power, we started our alphabet with a=2, b=3.... z=27.

1.

n=8383

r=3

intercepted message: 6859 216 1728 878

2.

n=20459

r=29

Intercepted message:

5314, 6293, 1801