Each book has an International Book Number: A-BCDEF-GHI-J, where A, B, C, D, E, F, G, H, and I are arranged by nine numbers, and J is the inspection number. Let S=10A+9B+8C+7D+6E+5F+4G+3H+2I. r is the remainder obtained by dividing S by 11. If r is not equal to 0 or 1, J=11-r (if r=0, J=0; if r=1, J is expressed by x). The ISBN of an existing book is 962y707015, then y=how many.
每一本书都有一个国际书号：A-BCDEF-GHI-J，其中A、B、C、D、E、F、G、H、I由九个数字排列而成，J是检查号码．令S=10A+9B+8C+7D+6E+5F+4G+3H+2I．r是S除以11所得的余数，若r不等于0或1，则规定J=11-r(若r=0，则规定J=0；若r=1，则规定J用x表示)．现有一本书的书号是962y707015，那么y=多少．
<result>7</result>