In a certain code language, 'BONE' is written as 'F15R5'. How will 'NOSE' be written in that language?

R15W5

1   2    3    4   5    6   7     8    9  10  11  12  13

 A   B   C    D   E    F   G    H    I    J    K    L   M

 ↓    ↓    ↓    ↓    ↓     ↓   ↓    ↓     ↓   ↓    ↓    ↓    ↓

 Z   Y    X   W   V    U   T    S    R   Q   P    O   N

26  25  24  23  22  21  20  19  18  17  16  15  14

**********************************************************

THE LOGIC FOLLOWED HERE IS :

B → (+4) → F

O → (PLACE VALUE) → 15

N → (+4) → R

E → (PLACE VALUE) → 5

SIMILARLY

N → (+4) → R

O → (PLACE VALUE) → 15

S → (+4) → W

E → (PLACE VALUE) → 5

HENCE (R15W5)  IS CORRECT ANSWER