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