Three industrial turbines, T_A, T_B, and T_C, undergo periodic safety checks. Turbine T_A is checked every 15 days for 1 day (on days 15, 30, 45, dots). Turbine T_B is checked every 20 days, but its cycle starts with a 5-day delay, so its checks occur on days 5, 25, 45, 65, dots. Turbine T_C is checked every 30 days, starting on day 10 (checked on days 10, 40, 70, dots). During a 360-day operational period, on