This solution is untested.
Column B
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| . . . . - - - . . . . |
| . 0 . 0 . | . 0 . . . |
- - - . . . . . 0 . | ^ |
| . . . - - 0 . | ^ |
| - - - | ( 0 . | ^ |
- - . . . | . 0 . | ^ |
| . . 0 0 . . . . | ^ |
| . 0 . . | . . . | ^ - -
| . . 0 - - - - - - . ? |
| . . > | < ^ ^ ^ ^ . ? |
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Label the Boulders
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| . . . . - - - . . . . |
| . L . K . | . J . . . |
- - - . . . . . H . | ^ |
| . . . - - G . | ^ |
| - - - | ( F . | ^ |
- - . . . | . E . | ^ |
| . . C D . . . . | ^ |
| . B . . | . . . | ^ - -
| . . A - - - - - - . ? |
| . . > | < ^ ^ ^ ^ . ? |
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Step One: Get Out
  1. Push B one tile south.
  2. Push C one tile south.
  3. Push D three tiles east.
  4. Push H four tiles west.
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| . . . . - - - . . . . |
| . L . K . | . J . . . |
- - - . H . . . . . | ^ |
| . . . - - G . | ^ |
| - - - | ( F . | ^ |
- - . . . | . E . | ^ |
| . . . . . . D . | ^ |
| . . C . | . . . | ^ - -
| . B A - - - - - - . ? |
| . . > | < ^ ^ ^ ^ . ? |
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Step Two: Column
  1. Take J.
  2. Push D east and take it.
  3. Take E and F the same way.
  4. Push G two north and take it.
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| . L . K . | . . . . . |
- - - . H . . . . . | . |
| . . . - - . . | . |
| - - - | ( . . | . |
- - . . . | . . . | . |
| . . . . . . . . | . |
| . . C . | . . . | ^ - -
| . B A - - - - - - . ? |
| . . > | < ^ ^ ^ ^ . ? |
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Step Three:
  1. Push H east and take it.
  2. Push K one south and take it.
  3. Push B two north and take it.
  4. Push C one tile west.
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| . L . . . | . . . . . |
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| . . . - - . . | . |
| - - - | ( . . | . |
- - . . . | . . . | . |
| . . . . . . . . | . |
| . C . . | . . . | . - -
| . . A - - - - - - . . |
| . . > | < ^ ^ . . . . |
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Step Four:
  1. Push A two tiles north.
  2. Push A east and take it.
  3. Push L two east, one south.
  4. Push L east and take it.
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- - - . . . . . . . | . |
| . . . - - . . | . |
| - - - | ( . . | . |
- - . . . | . . . | . |
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| . C . . | . . . | . - -
| . . . - - - - - - . . |
| . . > | < . . . . . . |
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