Letters Change!!

Starting with SOFT, change one letter at a time until you have the word LENS. Each change leaves the other letters in their original places and must result in a proper word. What is the minimum number of steps required to achieve this change?

SOFT
....
....
....
....
....
LENS

Answer:

 The minimum steps required is three steps.

SOFT
LOFT
LEFT
LENT
LENS


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