Kenji Nakayama and Christopher Hope buy signs from homeless people in the Boston area for $10 and give them a new hand-painted sign in its place. They also share the stories of these people on their Tumblr Signs for the Homeless to raise awareness.

Here are just a few of the people they've helped and their stories.

Angela became homeless after the sister she was staying with stabbed her in the head during a fight.

A mild stroke and layoffs led to Mike becoming homeless after years of working in the construction industry.

Colleen ran away from home for reasons she'd rather not discuss. She's been homeless for three years.

Bobbi became homeless when she fled an abusive partner. She's now been homeless for two years.

Be sure to visit Signs for the Homeless to see more of the work these artists have done.