digraph yearMonthDuration { 

// pattern [label=""];
n0[label="grammars: W2 D8 2E PER 1E"];
n1[ label="seq"];
n0 -> n1;
n2[ label="0-1"];
n1 -> n2;
n3[ label="'-'"];
n2 -> n3;
n4[ label="1-1"];
n1 -> n4;
n5[ label="'P'"];
n4 -> n5;
n6[ label="1-1"];
n1 -> n6;
n7[ label="re"];
n6 -> n7;
n8[ label="or"];
n7 -> n8;
n9[ label="seq"];
n8 -> n9;
n10[ label="1-1"];
n9 -> n10;
n11[ label="re"];
n10 -> n11;
n12[ label="seq"];
n11 -> n12;
n13[ label="1-1"];
n12 -> n13;
n14[ label="re"];
n13 -> n14;
n15[ label="seq"];
n14 -> n15;
n16[ label="1-*"];
n15 -> n16;
n17[ label="[0-9]"];
n16 -> n17;
n20[ label="1-1"];
n15 -> n20;
n21[ label="'Y'"];
n20 -> n21;
n22[ label="0-1"];
n12 -> n22;
n23[ label="re"];
n22 -> n23;
n24[ label="seq"];
n23 -> n24;
n25[ label="1-*"];
n24 -> n25;
n26[ label="[0-9]"];
n25 -> n26;
n29[ label="1-1"];
n24 -> n29;
n30[ label="'M'"];
n29 -> n30;
n31[ label="seq"];
n8 -> n31;
n32[ label="1-1"];
n31 -> n32;
n33[ label="re"];
n32 -> n33;
n34[ label="seq"];
n33 -> n34;
n35[ label="1-*"];
n34 -> n35;
n36[ label="[0-9]"];
n35 -> n36;
n39[ label="1-1"];
n34 -> n39;
n40[ label="'M'"];
n39 -> n40;
 }