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

Calculating dependencies... done!
[ebuild   R   ] dev-lang/python-2.5.1-r4  USE="berkdb gdbm ipv6 ncurses readline ssl -bootstrap -build -doc -examples -nothreads -sqlite -tk -ucs2" 0 kB

Total: 1 package (1 reinstall), Size of downloads: 0 kB