Changing a Part of Word

All of us know cw (change word) command, to change a word.
It changes word from cursor to end of word. Suppose you want
to change a part of word.

for example: Mismanagement to Management

(i). Suppose your cursor is at M of Mismanagement, like
Mismanagement

(ii). Since you want to change only 4 characters "Mism" to "M",
Press c4l (Remembrall: Change 4 Left)
Then press M as replacement word. You will get
Management

Note