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