The third letter of the Cyrillic alphabet looks familiar...but don't be fooled! This is not a "B" (that was the previous letter!). Вв (see, the little one is not like in English) is actually equivalent to "V." So the word "валенки" (traditional Russian embroidered felt boots) is pronounced "valyenki." In handwriting, the letters look like this: Вв.
Some more notes on Вв:
-At the end of a word (and after some letters...but this is beyond the basics for now), it is softened to sound like "ff" (that's why some Russian names are written with this ending in English).
-The Russian equivalents of some English "B" names use this letter and become "V" names: Basil = Vasily; Barbara = Varvara. This is just a fun fact, but it can help you remember the B/V relationship.