bedbathandbeyond

go through each character until we hit a word.
if we hit the end of the string without hitting a word, it's False.
if we hit a word, do this again until we hit the end without hitting a word, in which case, we add to the most-recently added substring.

b -> not a word
be -> a word [be]
d -> not a word
...
dbathandbeyond -> not a word [be]
bed -> a word [bed]
b -> not a word
...
bat -> a word [bed,bat]
h -> not a word
...
hand -> a word [bed,bat,hand]
b -> not a word
be -> a word [bed, bat, hand, be]
y -> not a word
yo -> a word [bed, bat, hand, be, yo]
..
nd -> not a word
yon -> a word [bed,bat,hand,be,yon]
d -> not a word
yond -> a word [bed,bat,hand,be,yond]

-> True