#!/bin/bash

bucket="bucket_name"
awk -v b="$bucket" '{sub(/([^[:blank:]]+[[:blank:]]+){3}/, "&" b "/")} 1' << EOF
2014-01-10 18:23:25          0 Andy/ADPTER/
2014-01-10 18:23:36        503 Sandy/ADPTER/ACCOUNTTYPE MAP.csv
2014-01-10 18:23:38        516 John/ADPTER/CITY MAP.csv
2014-01-10 18:23:38        398 Wendy/ADPTER/COUNTRY MAP.csv
2014-01-10 18:23:38      11117 Andy/ADPTER/CURRENCY MAP.csv
2014-01-10 18:23:38        260 Sandy/ADPTER/GENDER MAP.csv
2014-01-10 18:23:39        466 John/ADPTER/STATE MAP.csv
2014-01-10 18:23:40        373 Jim/ADPTER/UNITS MAP.csv
EOF