Tolong jelaskan mengenai Tahap kualifikasi dari Kejuaraan Eropa U-23 UEFA 1972

The allocation of teams into qualifying groups was based on that of UEFA Euro 1972 qualifying tournament with several changes, reflecting the absence of some nations:

Group 2 and 8 had the same competing nations

Group 1 did not include Wales

Group 3 did not include England and Malta

Group 4 did not include Northern Ireland and Cyprus

Group 5 did not include Belgium and Scotland

Group 6 did not include Republic of Ireland

Group 7 did not include Luxembourg