Girls like Falmata face an incredibly difficult time.

Most of those who don’t detonate their bombs are captured by the security forces and taken to a “deradicalisation centre”.

These centres are run by the army and very little is known about what happens there.

In mid January, the army said they had released the first group of “deradicalised” people, although it’s unclear where they are now.

The few who do manage to slip back into their community unnoticed remain in the shadows.

They are referred to by some in their communities as “annoba”, which means something like “epidemic”.

Any girl that spent time with the militants will be seen as Boko Haram by many people, says Akilu.

“I think that people in these communities tend to look at the act, rather than the girl.

“They see the girl and think, ‘This is a young person who is willing to eliminate our whole community, how can we then take her back?’”

She says the girls also remind them of the terror that they have lived through.

Boko Haram is considered one of the deadliest militant groups in modern history. Since 2009 they have killed more than 27,000 innocent people - including Muslims - in Nigeria alone.

Many more have been killed in Cameroon, Chad and Niger. The fighting has displaced more than two million people.

“Almost 90% of the communities in the north-east [of Nigeria] have been affected by Boko Haram. Either they have lost loved ones or entire families,” says Akilu.

“So when the girls come back it’s almost like a secondary trauma. There’s a big problem with stigma.

“We don’t really spend enough time looking at it from the point of view of the girls, and see them as the victims they are.”