Which R142 i hope it Bombardier next that 370 cars will be converted to R188 original plan few years ago.. new 103 cars of R188.. That 473 cars of new R188 . 370 conversion cars of R142 will become R188 , 103 new R188 cars... So that it. there 473 conversion of R142/R188 & 506 R142A/R188 cars.. That it.. I know just saying. 126 new cars so call R142A/R188 will run on the 7 line will fail. Try to something new it fail later.. I probably sure 473 cars of R188 will run 9 cars set . That A+B+B+B+A ( 5 cars set) / A+B+B+A ( 4 cars set) altogether you get 9 cars set running ..