To remove "str" no matter where in the cell it is found, use the Edit...Replace menu item
1) Select the cells you want to go through
2) Open the Edit...Replace menu item
3) Enter str in the Find field and leave the Replace field blank. Click "Replace All"
To remove the first three characters (no matter what they might be), you can use the Text to Columns menu item
1) Select the cells you want to split
2) Open the Data...Text to Columns menu item
3) Choose Fixed Width text, then click "Next" button
4) Click between character three and four in the next dialog, then click the "Next" button
5) The first column should be selected. Choose "Do not import column (skip)" from the option buttons on the right. Click "Finish"
To remove the first three characters only if they are str:
1) Put something like the following formula in a blank column:
=IF(LEFT(A1,3)="str",MID(A1,4,99),A1)
This formula is case insensitive.
2) Copy this formula down
3) Copy the cells containing this formula
4) Select the original data and Edit...Paste Special...Values
5) Clear the cells containing the formula by selecting them and using the Edit...Clear Contents menu item
Brad