An investment company, WinLose, recruits employees to trade in the share market. For newcomers, they have a one-year probation period. During this period, the employees are given Rs. 1 lakh per month to invest the way they see fit. They are evaluated at the end of every month, using the following criteria: 1. If the total loss in any span of three consecutive months exceeds Rs. 20,000, their services are terminated at the end of that 3-month period, 2. If the total loss in any span of six consecutive months exceeds Rs. 10,000, their services are terminated at the end of that 6-month period. Further, at the end of the 12-month probation period, if there are losses on their overall investment, their services are terminated. Ratan, Shri, Tamal and Upanshu started working for WinLose in January. Ratan was terminated after 4 months, Shri was terminated after 7 months, Tamal was terminated after 10 months, while Upanshu was not terminated even after 12 months. The table below, partially, lists their monthly profits (In Rs. '000) over the 12-month period, where x, y and z are masked information. Note: 1. A negative profit value indicates a loss. 2. The value in any cell is an integer. Illustration: As Upanshu is continuing after March, that means his total profit during January-March (2z+2z+0) ≥ −Rs.20,000. Similarly, as he is continuing after June, his total profit during January-June ≥ −Rs.10,000, as well as his total profit during April-June ≥ −Rs.20,000. Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec Ratan | -20 | -10 | x | -25 | - | - | - | - | - | - | - | - Shri | x | y | -25 | -20 | y/2 | -20 | -30 | - | - | - | - | - Tamal | -10 | -10 | x/2 | y | x | -20 | 5 | 5 | 10 | -z | - | - Upanshu | 2z | 2z | 0 | -8 | -10 | 0 | -x | y | -20 | -28 | z | -15