my $start = 'string-here string-here:';
my $level = '\((\w+)\)';
my $group = '([\w\s]+) completed,';
my $total = 'Total (\d+) client\(s\),';

# if there are details, they're captured in the end parens
my $re = qr/^$start $level $group $total ?(.*)$/;