Simple past and past perfect

Match the labels to reconstruct the sentences.
When Saroo woke up,
He had never seen such a big city as Calcutta
Saroo had survived on the streets for weeks before
By the time Saroo arrived in Australia,
When he returned to India,
Saroo always knew
When Saroo reunited with his family, he discovered that
Saroo knew that Mantosh
the train had already traveled hundreds of miles from his hometown.
before he arrived there.
somebody took him to the police.
he had forgotten much of his native language.
he realized that a lot of things had not changed.
that the Brieleys had never had children.
his sister Shekila had become a schoolteacher after he had disappeared.
had had a lot of difficulties in India before bieng adopted.