import java.util.*;
import java.lang.*;
class Main {
String str
= "test text test"; String replaced
= str.
replaceAll("((?<= ) | (?= ))",
" "); System.
out.
printf("Replaced: [%s]%n", replaced
); }
}
aW1wb3J0IGphdmEudXRpbC4qOwppbXBvcnQgamF2YS5sYW5nLio7CgpjbGFzcyBNYWluIHsKCXB1YmxpYyBzdGF0aWMgdm9pZCBtYWluIChTdHJpbmdbXSBhcmdzKSB0aHJvd3MgamF2YS5sYW5nLkV4Y2VwdGlvbiB7CiAgICAJU3RyaW5nIHN0ciA9ICJ0ZXN0ICAgIHRleHQgdGVzdCI7CiAgICAgICAgU3RyaW5nIHJlcGxhY2VkID0gc3RyLnJlcGxhY2VBbGwoIigoPzw9ICkgfCAoPz0gKSkiLCAiJm5ic3A7Iik7CgkJU3lzdGVtLm91dC5wcmludGYoIlJlcGxhY2VkOiBbJXNdJW4iLCByZXBsYWNlZCk7Cgl9Cn0=