Insulation
insulation
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COLD
ENERGY
FIRE
HEAT
HOT
INSULATOR
STOVE
SUN
TRANSFER
| R | F | F | Q | C | G | E | N | I |
| P | O | V | E | N | E | R | G | Y |
| A | J | T | W | Z | A | I | H | A |
| H | T | R | A | N | S | F | E | R |
| L | V | H | T | L | V | N | A | D |
| G | R | I | R | C | U | U | T | H |
| C | G | E | V | O | T | S | B | U |
| N | B | N | F | L | Z | O | N | O |
| G | N | H | N | D | C | P | H | I |
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