Which is an breadthfirst traversal of the following tree?

                        t
              /                 \
            h                   a
         /      \             /      \
       n         k           s        k
      /  \      / \        /   \     /   \ 
     i    v    e   r      y     m   u    c
   /     /
  h    s
 / \
k  i