Add a 4-bar POP STRING ENSEMBLE 1 track in the following composition:
PS T4Q4 GMPOP KMG BM135 CMEbQDmQEb BL4 IL73Q49Q32Q72Q53Q0Q89Q48 TS INST0 DN0 BS BE BS BE BS BE BS BE TE TS INST48 DN0 BS BE TE TS INST72 DN1 BS TD2X99 NO82 TD1X792 NOF82 TD0X646 NO82 TD9X875 NOF82 BE BS TD5X865 NO82 TD2X083 NOF82 TD0X031 NO86 TD3X76 NOF86 TD0X094 NO84 TD3X792 NOF84 TD0X177 NO86 TD0X198 NOF86 BE BS NO86 TD2X24 NO84 TD0X052 NOF86 TD2X427 NOF84 TD0X438 NO82 TD2X615 NO81 TD0X01 NOF82 TD4X458 NO82 TD0X146 NOF81 TD2X281 NOF82 BE BS TD0X031 NO82 TD2X188 NOF82 TD0X24 NO81 TD3X406 NOF81 TD0X083 NO79 TD3X698 NO77 TD0X146 NOF79 TD3X302 NOF77 TD0X729 NO77 TD1X948 NOF77 BE TE TS INST89 DN2 BS TD15X365 NO69 NO67 TD0X635 NOF69 NOF67 BE BS NO69 NO67 TD7X615 NOF69 NOF67 TD7X729 NO62 NO69 TD0X104 NO67 NO65 TD0X552 NOF62 NOF69 NOF67 NOF65 BE BS NO62 NO69 NO67 NO65 TD14X448 NOF67 NOF65 TD0X583 NOF62 NOF69 TD0X49 NO67 NO64 NO69 NO60 NO62 TD0X479 NOF67 NOF64 NOF69 NOF60 NOF62 BE BS NO67 NO64 NO69 NO60 NO62 TD0X115 NOF67 NOF64 TD13X833 NOF69 NOF60 NOF62 TD0X885 NO70 TD0X031 NO67 NO63 TD1X135 NOF70 NOF67 NOF63 BE TE PE
TS INST49 DN2 BS TD15X656 NO69 NO67 TD0X344 NOF69 NOF67 BE BS NO69 NO67 TD7X906 NOF69 NOF67 TD7X729 NO62 NO69 TD0X104 NO67 NO65 TD0X26 NOF62 NOF69 NOF67 NOF65 BE BS NO62 NO69 NO67 NO65 TD14X74 NOF67 NOF65 TD0X583 NOF62 NOF69 TD0X49 NO67 NO64 NO69 NO60 NO62 TD0X188 NOF67 NOF64 NOF69 NOF60 NOF62 BE BS NO67 NO64 NO69 NO60 NO62 TD0X406 NOF67 NOF64 TD13X833 NOF69 NOF60 NOF62 TD0X885 NO70 TD0X031 NO67 NO63 TD0X844 NOF70 NOF67 NOF63 BE TE