Logic: Each coded letter has been obtained by succeeding the letters of the given word by three and four places alternately. The pattern followed here is:
R
A
I
N
B
O
W
↓+3
↓+4
↓+3
↓+4
↓+3
↓+4
↓+3
U
E
L
R
E
S
Z
T
R
A
C
T
O
R
↓+3
↓+4
↓+3
↓+4
↓+3
↓+4
↓+3
W
V
D
G
W
S
U
Similarly, The code for the word 'COMPUTER' will be: