| 253 |      1 | 
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|  |      2 | assert(run("[-]", Map(0 -> 100)) == Map(0 -> 0))
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|  |      3 | assert(run("[->+<]", Map(0 -> 10)) == Map(0 -> 0, 1 -> 10))
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|  |      4 | assert(run("[>>+>>+<<<<-]", Map(0 -> 42)) == Map(0 -> 0, 2 -> 42, 4 -> 42))
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|  |      5 | val hw_urban = """+++++[->++++++++++<]>--<+++[->>++++++++++
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|  |      6 |                   <<]>>++<<----------[+>.>.<+<]"""
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|  |      7 | assert(run(hw_urban) == Map(0 -> 0, 1 -> 58, 2 -> 32))
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|  |      8 | 
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|  |      9 | val hw_urban1 = """++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.
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|  |     10 |                    +++++++..+++.>>.<-.<.+++.------.--------.>>+.>++."""
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|  |     11 | 
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|  |     12 | assert(run(hw_urban1) == Map(0 -> 0, 5 -> 33, 1 -> 0, 6 -> 10, 2 -> 72, 3 -> 100, 4 -> 87))
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