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