Problems

# Spider and Fly

# Spider and Fly

In an empty rectangular room in the sizes `A х B х C`

(the length, width, height) has fallen to the floor the fallen asleep fly. The spider who was on one of walls, or on a room’s floor, has started to move to it on the shortest way.

On what distance it thus will move?

#### Input

In the first line it is set the sizes of a room `A`

, `B`

, `C`

. In the second line - co-ordinates of a fly on the floor `X`

, _{1}`Y`

, and spider _{1}`X`

, _{2}`Y`

, _{2}`Z`

._{2}

All input date - the integers which are not exceeding 500.

#### Output

One line – the distance on which the spider will move, calculated to within 2 signs after a decimal point.

Input example #1

1 1 1 1 1 1 1 0

Output example #1

0.00