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