01: 1st ladder ← 02: 1st ladder → 03: 1st ladder ← 04: 1st ladder → 05: 1st ladder ← 06: 1st ladder → 07: 1st ladder → 08: 1st ladder ← 09: 1st ladder → 10: 1st ladder → | 01: ↑ front ladder 02: 1st ladder → 03: 1st ladder → 04: 1st ladder ← 05: 1st ladder ← 06: 1st ladder ← 07: 1st ladder → 08: 1st ladder ← 09: 1st ladder → 10: 1st ladder → | 01: ↑ front ladder 02: 1st ladder ← 03: 2nd ladder → 04: 1st ladder → 05: 1st ladder ← 06: 1st ladder → 07: 1st ladder → 08: 1st ladder ← 09: 1st ladder → 10: 1st ladder ← | 01: 1st ladder ← 02: 1st ladder ← 03: 1st ladder →: 04: 1st ladder → 05: 1st ladder ← 06: 1st ladder ← 07: 1st ladder → 08: 1st ladder → 09: 1st ladder ← 10: 1st ladder → |