OP_READ_EXPECT_B
OP_READ_EXPECT_B(La0, "apple");
OP_READ_EXPECT_B(La1, "orange");
OP_READ_EXPECT_B(La2, "Strawberry");
OP_READ_EXPECT_B(La3, "sync");
OP_READ_EXPECT_B(La3, "sync");
OP_READ_EXPECT_B(La0, "orange");
OP_READ_EXPECT_B(La0, "extra");
OP_READ_EXPECT_B(Cb, "foo");
OP_READ_EXPECT_B(La, "apple");
OP_READ_EXPECT_B(C, "orange");