Extract string between two delimeter " "

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input string="3MMTQSZ348GGMZRQWMJM4SD6M";output string="3MMTQ-SZ348-GGMZR-QWMJM-4SD6

input string="3MMTQSZ348GGMZRQWMJM4SD6M" output string="3MMTQ-SZ348-GGMZR-QWMJM-4SD6M" using linux shell script

Shell Programming and Scripting