Uzbekistan and Liechtenstein are the world's only doubly landlocked countries. That's why I mentioned them 🙂.
Of the other former Soviet states, Russia has a huge northern coastline, Estonia, Latvia and Lithuania are on the Baltic, Georgia and Ukraine are on the Black Sea. As for the singly landlocked states, Armenia, Azerbaijan and Turkmenistan border Iran, Tajikistan, Kazakhstan and Kyrgyzstan border China, Belarus borders Lithuania, Moldova borders Romania (and there are other borders with coastal states too.)
E&OE.