Simple C program

[Spooky]

This can be a very VERY simple little function in c for the most of you but i'am a c beginner and i need to get this working and i don't have much time to do it...

I need to insert an '-' (MINUS) before a sequence of lowercase letters that ends with a lowercase vowel.

ex: in the console i do ...
./program
asdfasda&hasssda7GUASDA8o9sssasdas

and the result is ->

-asdfasda&-hasssda7GUASDA8-o9sssasdas

i have to do this without no pointers ... just simple arrays and strings programing.
just one more thing, this must be a function that is called in the main and in there it must have a printf(...) that gives me the result i need... something like this

in main():

function(input,output);
printf(output);

(just for example)

if you have any ideias how can i do this, plz help...
if you could send some code examples it would be very nice

thanks in advance for the time.

Spooky.

[Kernel_Killer]

I would use a for statement to do this with the condition being any letter !=[a,e,i,o,u], and another loop to find the vowel. Maybe just inputting each character into an array and using a counter in another loop might help. Just some thoughts.