WORD LADDERS
M
I
L
K
+
C
O
C
O
A
=
P
E
A
K
S
+
C
H
A
L
L
E
N
G
E
=
S
H
A
R
P
+
C
U
T
=
F
L
A
T
H
E
A
D
+
S
T
A
R
=
+
=
+
=
-
+
-
=