digraph block {
    N0[label="entry"];
    N1[label="exit"];
    N2[label="expr 8"];
    N3[label="local x"];
    N4[label="stmt let x = 8;"];
    N5[label="local _y"];
    N6[label="stmt let _y;"];
    N7[label="expr x"];
    N8[label="expr 88"];
    N9[label="expr x > 88"];
    N10[label="expr 888"];
    N11[label="expr _y"];
    N12[label="expr _y = 888"];
    N13[label="stmt _y = 888;"];
    N14[label="block { _y = 888; }"];
    N15[label="expr if x > 88 { _y = 888; }"];
    N16[label="block { let x = 8; let _y; if x > 88 { _y = 888; } }"];
    N0 -> N2;
    N2 -> N3;
    N3 -> N4;
    N4 -> N5;
    N5 -> N6;
    N6 -> N7;
    N7 -> N8;
    N8 -> N9;
    N9 -> N10;
    N10 -> N11;
    N11 -> N12;
    N12 -> N13;
    N13 -> N14;
    N9 -> N15;
    N14 -> N15;
    N15 -> N16;
    N16 -> N1;
}