def intYoCIS( fileName ) :
    """Returns the list of integers ( yo, C, I, S ) from fileName where fileName must be of the from 'yo##c##i###s###'."""

    if ( len( fileName ) != 15 ) : raise Exception( "\nError from intYoCIS: bad file name = %s" % repr(fileName) )
    return ( int( fileName[2:4] ), int( fileName[5:7] ), int( fileName[8:11] ), int( fileName[12:15] ) )