In each question, the first and the last sentences of the passage are numbered S1 and S6 respectively. The rest of the passage is split into four parts. These four sentences are jumbled. Read the sentences and identify their correct and logical order.

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S1: Work with retarded children, in particular, involves superhuman patience and long-delayed rewards.
P: Another woman faithfully spent two hours a day, five days a week, with a bed-ridden retarded girl.
Q: It was three years before the girl made her first cut in a piece of paper.
R: The girl had never before responded to, or recognised anyone.
S: One woman decided to teach a young brain-damaged girl how to use scissors.
S6: After five years, the girl finally began to smile, when her foster grandparents entered the room.
The Proper sequence should be: