struct S1 { int x; };
struct S2 { S1 x; };
struct S3 { S2 x; };
struct S4 { S3 x; };
struct S5 { S4 x; };
struct S6 { S5 x; };
struct S7 { S6 x; };
struct S8 { S7 x; };
in S8 s8;

struct SA1 { int x[8]; };
struct SA2 { SA1 x[7]; };
struct SA3 { SA2 x[6]; };
struct SA4 { SA3 x[5]; };
struct SA5 { SA4 x[4]; };
struct SA6 { SA5 x[3]; };
struct SA7 { SA6 x[2]; };
struct SA8 { SA7 x[1]; };
in SA8 sa8[9];