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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I did this in nawk, which doesn't support extended regular expressions. If instead you're using gawk, which does, check out \b for word boundaries in extended regular expressions. The [^a-z][a-z] approach you showed consumes the prior character.
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