Change One Letter

[Weisserstein]

Pass

[Nicholas]

Past

[Weisserstein]

Cast

[Nicholas]

Cat

[Weisserstein]

Rat

[Nicholas]

Brat

[Weisserstein]

Frat

[Nicholas]

You changed two letters

[Weisserstein]

Changed it, sorry

[Nicholas]

Flat

[Weisserstein]

Fat

[Nicholas]

At

[Weisserstein]

Eat

[Nicholas]

East

[Weisserstein]

Feast

[Nicholas]

Beast

[maluhia]

Least

[Nicholas]

Last

[maluhia]

Cast

[Nicholas]

Past