By changing one letter at a time to form new English words, and leaving all other letters in their original positions, convert the word FOUR into the word NINE in eight (or fewer) steps. Good luck!

F O U R
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N I N E

Here is an eight-step SOLUTION.

AN EIGHT-STEP SOLUTION:

FOUR > DOUR > DOER > DOES > DIES > DINS > DINE > NINE

Did you come up with a different series of words? Please post your solution in the comments. Thanks!