reason : sfbtpo :: think : ?

Question:

reason : sfbtpo :: think : ?

Answer:

uijol

Solution:

as,

r+1=s

e+1=f

a+1=b

s+1=t

o+1=p

n+1=o

Similarly,

t+1=u

h+1=i

i+1=j

n+1=o

k+1=l