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Test Project for Apache Flink CEP Pattern

Test pattern:

// Strict Contiguity
a b+ c d e

Incoming values:

a b c d e

a b b c d e

//wrong order
a b d c e

//start event missing
b c d e

Execution result (print output)

abcde
abbcde

Question

How can I get access to input events, that not match in pattern? For example, in third case pattern is not matching because that is wrong order of input events, and events a, b got lost. Also, there is not matching pattern in fourth case, because start event is missing. All incoming events got lost.