These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 0.97 s (backtrack: 0/20).

[ebuild  N     ] acct-group/plugdev-0-r3::gentoo  0 KiB
[ebuild  N     ] sys-apps/uam-0.3.2-r2::gentoo  60 KiB

Total: 2 packages (2 new), Size of downloads: 60 KiB