-typedef struct { int a; int *b; } st;
-typedef union { int a; st s; st *t; int **c; } ut;
+typedef struct s_st { int a; int *b; } st;
+typedef union s_ut { int a; st s; st *t; int **c; } ut;
st gst;
ut *gu;
void modst (st s1) { modifies *s1.b; }
-void modu (ut *u) { modifies *u; }
\ No newline at end of file
+void modu (ut *u) { modifies *u; }