I have this question on tesselations,

Question

I got some homework and one of the questions are:

A tesselation with the notation of schlafli of {3,3,4,4}.
What formes are at the vertex.
Draw a tesselation of it.

I have been trying to figure this out for 30mins now and i just can't figure it out.

Another question,
Do the schlafli notation's only apply to regulier and and semi-regulier tesselations?

I am sorry that nobody has responded to your question earlier.

Since this is not my area of expertise, I searched Google under the key words "tessellations" to get these possible sources:

http://www.tessellations.org/
http://mathforum.org/sum95/suzanne/tess.intro.html
http://www.coolmath.com/tesspag1.htm
http://en.wikipedia.org/wiki/Tessellation

I hope this helps. Thanks for asking.