digraph operator {
    rankdir = LR;

    node [shape = circle, width = 0.7, height = 0.7, fontname = "monospace", fixedsize = true, fontsize = 12];
    edge [fontname = "monospace", fontsize = 12];

    node [shape = circle];
        START;

    node [style = filled];
        FINISH; SUB; ADD; AMP; MULT; LT; GT; EQ; OR; NOT; DIV; MOD; XOR; LTLT; GTGT;


    START -> SUB [label = "-"];
    START -> ADD [label = "+"];
    START -> AMP [label = "&"];
    START -> MULT [label = "*"];
    START -> LT [label = "<"];
    START -> GT [label = ">"];
    START -> EQ [label = "="];
    START -> OR [label = "|"];
    START -> NOT [label = "!"];
    START -> DIV [label = "/"];
    START -> MOD [label = "%"];
    START -> XOR [label = "^"];
    START -> FINISH [label = "[\\[\\]().,?:~;{}]"];

    SUB -> FINISH [label = "[>-=]"];

    ADD -> FINISH [label = "[+=]"];

    AMP -> FINISH [label = "[&=]"];

    MULT -> FINISH [label = "="];

    LT -> FINISH [label = "="];
    LT -> LTLT [label = "<"];

    GT -> FINISH [label = "="];
    GT -> GTGT [label = ">"];

    EQ -> FINISH [label = "="];

    OR -> FINISH [label = "[|=]"];

    NOT -> FINISH [label = "="];

    DIV -> FINISH [label = "="];

    MOD -> FINISH [label = "="];

    XOR -> FINISH [label = "="];

    LTLT -> FINISH [label = "="];

    GTGT -> FINISH [label = "="];
}