how o recognize a specific letter in different places in a cell??
 

Hi,

I have a lots of cells in which there it written things like these:

E2245_Gv070830f 3,5_3,5_01
E224_Gv070830o 3,5_3,5_01
E224_Gv071220f 4_4_01

I want to select all cells in which letter "o" or "f" is present. How can i
write this in code?? these letters can have different places in the cell..