If you had problems with remembering any of the numbers, it was likely the last two numbers (3 and 3). You probably had no problem with the numbers that were associated with COACH (262-24). I suspect it was the ending two letters (ED) that were easily forgotten. They are an addition to the basic chunk (C>O>A>C>H). We know from the neurosciences that we tend to store words in their basic form and then add on modifiers (such as “er”, “s” and “ed”). These modifiers are given lower priority and are therefore rather easily forgotten. One more lesson to be learned from the exciting new world of neuroscience.
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References

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