1-5 BACCA 6-10 AACAB 11-15 CCACB 16-20 AABCB 18-20 1977 travel agency 3 21-25 CACDA 26-30 DBACD 31-35 ABCAC 36-40 ABACD 41-45 BCBAC 46-50 DABBA 51-55 DCDBD 56-60 CDABA 61-65 CCABD 66-70 CADAB 71-75 CC...