The last couple classes have been 75% airbus, 25% boeing and bid on with seniority, with the 737 going more senior than airbus. PIT vacancies have gone to both of the last 2 new hire classes but it's a small base so it's often hit or miss. PIT is all bus, we don't know which base will add 737 next but larger bases are more likely over PIT. The plan is for the airline to have both fleets indefinetly or at least for the next decade.