topics1 = ['MAR', 'STA']
topics2 = ['KST', 'ABS', 'KTR']

accounts = []

for t in topics1:
    accounts += [t + '_' + str(i).zfill(2) + ';n.v.\n' for i in range(10)]
for t in topics2:
    accounts += [t + '_' + str(i).zfill(2) + ';n.v.\n' for i in range(100)]

with open('Kontenrahmen_Merkmale.csv', 'w') as f:
    f.writelines(accounts)