hostel_id,bed_id,owner,reserved
block-a-upper-hostel,block-a-upper-hostel_A_101_A,,0
block-a-upper-hostel,block-a-upper-hostel_A_101_B,,1
block-a-upper-hostel,block-a-upper-hostel_A_101_C,,2
block-a-upper-hostel,block-a-upper-hostel_A_101_D,K1000000,0
block-a-upper-hostel,block-a-upper-hostel_A_101_E,K999,0