import sys;

abs_path = sys.stdin.readline().rstrip('\n')
params = sys.stdin.readline().split(',')

if len(params) != 3:
    print "Invalid Input"
    sys.exit();

dept = params[0]
page_size = int(params[1])
page_num = int(params[2]) - 1

def FileParser(path):
    f = open(path)
    row = f.readline()
    data_dict = {}
    while row != '':
        row = f.readline()
        if row != '':
            row = row.rstrip('\n')
            columns = row.split(',')
            temp_dict = {}
            dept_id = columns[0]
            temp_dict['dept'] = dept_id
            temp_dict['id'] = columns[1]
            name_parts = columns[2].split(" ")

            if len(name_parts) > 1:
                temp_dict['fname'] = name_parts[1]
            else:
                temp_dict['fname'] = columns[2]

            temp_dict['full_name'] = columns[2]

            if not dept_id in data_dict:
                data_dict[dept_id] = []
            data_dict[dept_id].append(temp_dict)
    f.close()
    for department_id in data_dict:
        data_dict[department_id].sort(key=lambda k: len(k['full_name']))
    return data_dict;

emp_dict = FileParser(abs_path)

if dept in emp_dict:
    offset = page_num * page_size
    if offset > 0:
        offset -= 1
    dept_size = len(emp_dict[dept])
    if offset < dept_size:
        arr = []
        for x in range(offset,min(dept_size,offset+page_size)):
            arr.append(emp_dict[dept][x])
        arr.sort()
        for emp in arr:
            print ','.join([str(dept),emp['id'],emp['full_name']])
        sys.exit()

print "Data Unavailable"