1Tree edge: 0 --> 2 2Tree edge: 2 --> 1 3Back edge: 1 --> 1 4Finish edge: 1 --> 1 5Tree edge: 1 --> 3 6Back edge: 3 --> 1 7Finish edge: 3 --> 1 8Tree edge: 3 --> 4 9Back edge: 4 --> 0 10Finish edge: 4 --> 0 11Back edge: 4 --> 1 12Finish edge: 4 --> 1 13Forward or cross edge: 2 --> 3 14Finish edge: 2 --> 3 15Finish edge: 0 --> 2 161 10 173 8 182 9 194 7 205 6 21