#Centipede Update documentation on naming for corpus and feature files

PiperOrigin-RevId: 547228198
diff --git a/centipede/README.md b/centipede/README.md
index 3073d04..0615051 100644
--- a/centipede/README.md
+++ b/centipede/README.md
@@ -257,8 +257,8 @@
 ```
 ...
 ├── <fuzz target name>-d9d90139ee2ccc687f7c9d5821bcc04b8a847df5
-│   └── features.0
-└── corpus.0
+│   └── features.000000
+└── corpus.000000
 ```
 
 ### Run 5 concurrent fuzzing jobs
@@ -279,16 +279,16 @@
 ```
 ...
 ├── <fuzz target name>-d9d90139ee2ccc687f7c9d5821bcc04b8a847df5
-│   ├── features.0
-│   ├── features.1
-│   ├── features.2
-│   ├── features.3
-│   └── features.4
-├── corpus.0
-├── corpus.1
-├── corpus.2
-├── corpus.3
-└── corpus.4
+│   ├── features.000000
+│   ├── features.000001
+│   ├── features.000002
+│   ├── features.000003
+│   └── features.000004
+├── corpus.000000
+├── corpus.000001
+├── corpus.000002
+├── corpus.000003
+└── corpus.000004
 ```
 
 ## Corpus distillation
diff --git a/centipede/environment.cc b/centipede/environment.cc
index 6be11c6..6d8d4ab 100644
--- a/centipede/environment.cc
+++ b/centipede/environment.cc
@@ -311,7 +311,7 @@
           "arguments, copies each blob to a temporary file, and applies this "
           "command to that temporary file. %P is replaced with the temporary "
           "file's path and %H is replaced with the blob's hash. Example:\n"
-          "$ centipede --for_each_blob='ls -l  %P && echo %H' corpus.0");
+          "$ centipede --for_each_blob='ls -l  %P && echo %H' corpus.000000");
 ABSL_FLAG(std::string, experiment, "",
           "A colon-separated list of values, each of which is a flag followed "
           "by = and a comma-separated list of values. Example: "