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Contents

Determine if a word or phrase is an isogram.

An isogram (also known as a "nonpattern word") is a word or phrase without a repeating letter, however spaces and hyphens are allowed to appear multiple times.

Examples of isograms:

- lumberjacks
- background
- downstream
- six-year-old

The word *isograms*, however, is not an isogram, because the s repeats.

## Source

[https://en.wikipedia.org/wiki/Isogram](https://en.wikipedia.org/wiki/Isogram)

## Submitting Incomplete Solutions
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Version data entries

68 entries across 68 versions & 1 rubygems

Version Path
trackler-2.2.1.139 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.138 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.137 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.136 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.135 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.134 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.133 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.132 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.131 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.130 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.129 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.128 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.127 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.126 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.125 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.124 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.123 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.122 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.121 tracks/prolog/exercises/isogram/README.md
trackler-2.2.1.120 tracks/prolog/exercises/isogram/README.md